Merge 0.4.15 changes into stable-0.4

0.4.15 release!

30 files changed, 1536 insertions, 701 deletions

diff --git a/builtin/common/misc_helpers.lua b/builtin/common/misc_helpers.lua
index e4653d41d..c2dc7514d 100644
--- a/builtin/common/misc_helpers.lua
+++ b/builtin/common/misc_helpers.lua
@@ -382,7 +382,6 @@ if INIT == "game" then
 					itemstack, pointed_thing)
 			return
 		end
-		local pitch = placer:get_look_pitch()
 		local fdir = core.dir_to_facedir(placer:get_look_dir())
 		local wield_name = itemstack:get_name()
 
diff --git a/builtin/common/strict.lua b/builtin/common/strict.lua
index 05ceadf7a..23ba3d727 100644
--- a/builtin/common/strict.lua
+++ b/builtin/common/strict.lua
@@ -5,6 +5,9 @@ local WARN_INIT = false
 
 
 function core.global_exists(name)
+	if type(name) ~= "string" then
+		error("core.global_exists: " .. tostring(name) .. " is not a string")
+	end
 	return rawget(_G, name) ~= nil
 end
 
diff --git a/builtin/common/vector.lua b/builtin/common/vector.lua
index e9ed3aab3..90ba3cc8b 100644
--- a/builtin/common/vector.lua
+++ b/builtin/common/vector.lua
@@ -31,6 +31,14 @@ function vector.normalize(v)
 	end
 end
 
+function vector.floor(v)
+	return {
+		x = math.floor(v.x),
+		y = math.floor(v.y),
+		z = math.floor(v.z)
+	}
+end
+
 function vector.round(v)
 	return {
 		x = math.floor(v.x + 0.5),
@@ -130,4 +138,3 @@ function vector.divide(a, b)
 			z = a.z / b}
 	end
 end
-
diff --git a/builtin/game/auth.lua b/builtin/game/auth.lua
index deb811b14..46fe3d342 100644
--- a/builtin/game/auth.lua
+++ b/builtin/game/auth.lua
@@ -199,3 +199,19 @@ core.register_on_joinplayer(function(player)
 	record_login(player:get_player_name())
 end)
 
+core.register_on_prejoinplayer(function(name, ip)
+	local auth = core.auth_table
+	if auth[name] ~= nil then
+		return
+	end
+
+	local name_lower = name:lower()
+	for k in pairs(auth) do
+		if k:lower() == name_lower then
+			return string.format("\nCannot create new player called '%s'. "..
+					"Another account called '%s' is already registered. "..
+					"Please check the spelling if it's your account "..
+					"or use a different nickname.", name, k)
+		end
+	end
+end)
diff --git a/builtin/game/chatcommands.lua b/builtin/game/chatcommands.lua
index 3350140ee..2bd93855b 100644
--- a/builtin/game/chatcommands.lua
+++ b/builtin/game/chatcommands.lua
@@ -14,19 +14,6 @@ function core.register_chatcommand(cmd, def)
 	core.chatcommands[cmd] = def
 end
 
-if core.setting_getbool("mod_profiling") then
-	local tracefct = profiling_print_log
-	profiling_print_log = nil
-	core.register_chatcommand("save_mod_profile",
-			{
-				params      = "",
-				description = "save mod profiling data to logfile " ..
-						"(depends on default loglevel)",
-				func        = tracefct,
-				privs       = { server=true }
-			})
-end
-
 core.register_on_chat_message(function(name, message)
 	local cmd, param = string.match(message, "^/([^ ]+) *(.*)")
 	if not param then
@@ -51,6 +38,12 @@ core.register_on_chat_message(function(name, message)
 	return true  -- Handled chat message
 end)
 
+if core.setting_getbool("profiler.load") then
+	-- Run after register_chatcommand and its register_on_chat_message
+	-- Before any chattcommands that should be profiled
+	profiler.init_chatcommand()
+end
+
 -- Parses a "range" string in the format of "here (number)" or
 -- "(x1, y1, z1) (x2, y2, z2)", returning two position vectors
 local function parse_range_str(player_name, str)
@@ -102,7 +95,7 @@ core.register_chatcommand("help", {
 	description = "Get help for commands or list privileges",
 	func = function(name, param)
 		local function format_help_line(cmd, def)
-			local msg = "/"..cmd
+			local msg = core.colorize("#00ffff", "/"..cmd)
 			if def.params and def.params ~= "" then
 				msg = msg .. " " .. def.params
 			end
@@ -154,60 +147,79 @@ core.register_chatcommand("help", {
 core.register_chatcommand("privs", {
 	params = "<name>",
 	description = "print out privileges of player",
-	func = function(name, param)
-		param = (param ~= "" and param or name)
-		return true, "Privileges of " .. param .. ": "
+	func = function(caller, param)
+		param = param:trim()
+		local name = (param ~= "" and param or caller)
+		return true, "Privileges of " .. name .. ": "
 			.. core.privs_to_string(
-				core.get_player_privs(param), ' ')
+				core.get_player_privs(name), ' ')
 	end,
 })
+
+local function handle_grant_command(caller, grantname, grantprivstr)
+	local caller_privs = minetest.get_player_privs(caller)
+	if not (caller_privs.privs or caller_privs.basic_privs) then
+		return false, "Your privileges are insufficient."
+	end
+	
+	if not core.auth_table[grantname] then
+		return false, "Player " .. grantname .. " does not exist."
+	end
+	local grantprivs = core.string_to_privs(grantprivstr)
+	if grantprivstr == "all" then
+		grantprivs = core.registered_privileges
+	end
+	local privs = core.get_player_privs(grantname)
+	local privs_unknown = ""
+	local basic_privs =
+		core.string_to_privs(core.setting_get("basic_privs") or "interact,shout")
+	for priv, _ in pairs(grantprivs) do
+		if not basic_privs[priv] and not caller_privs.privs then
+			return false, "Your privileges are insufficient."
+		end
+		if not core.registered_privileges[priv] then
+			privs_unknown = privs_unknown .. "Unknown privilege: " .. priv .. "\n"
+		end
+		privs[priv] = true
+	end
+	if privs_unknown ~= "" then
+		return false, privs_unknown
+	end
+	core.set_player_privs(grantname, privs)
+	core.log("action", caller..' granted ('..core.privs_to_string(grantprivs, ', ')..') privileges to '..grantname)
+	if grantname ~= caller then
+		core.chat_send_player(grantname, caller
+				.. " granted you privileges: "
+				.. core.privs_to_string(grantprivs, ' '))
+	end
+	return true, "Privileges of " .. grantname .. ": "
+		.. core.privs_to_string(
+			core.get_player_privs(grantname), ' ')
+end
+
 core.register_chatcommand("grant", {
 	params = "<name> <privilege>|all",
 	description = "Give privilege to player",
 	func = function(name, param)
-		if not core.check_player_privs(name, {privs=true}) and
-				not core.check_player_privs(name, {basic_privs=true}) then
-			return false, "Your privileges are insufficient."
-		end
 		local grantname, grantprivstr = string.match(param, "([^ ]+) (.+)")
 		if not grantname or not grantprivstr then
 			return false, "Invalid parameters (see /help grant)"
-		elseif not core.auth_table[grantname] then
-			return false, "Player " .. grantname .. " does not exist."
-		end
-		local grantprivs = core.string_to_privs(grantprivstr)
-		if grantprivstr == "all" then
-			grantprivs = core.registered_privileges
-		end
-		local privs = core.get_player_privs(grantname)
-		local privs_unknown = ""
-		local basic_privs =
-			core.string_to_privs(core.setting_get("basic_privs") or "interact,shout")
-		for priv, _ in pairs(grantprivs) do
-			if not basic_privs[priv] and
-					not core.check_player_privs(name, {privs=true}) then
-				return false, "Your privileges are insufficient."
-			end
-			if not core.registered_privileges[priv] then
-				privs_unknown = privs_unknown .. "Unknown privilege: " .. priv .. "\n"
-			end
-			privs[priv] = true
-		end
-		if privs_unknown ~= "" then
-			return false, privs_unknown
-		end
-		core.set_player_privs(grantname, privs)
-		core.log("action", name..' granted ('..core.privs_to_string(grantprivs, ', ')..') privileges to '..grantname)
-		if grantname ~= name then
-			core.chat_send_player(grantname, name
-					.. " granted you privileges: "
-					.. core.privs_to_string(grantprivs, ' '))
-		end
-		return true, "Privileges of " .. grantname .. ": "
-			.. core.privs_to_string(
-				core.get_player_privs(grantname), ' ')
+		end	
+		return handle_grant_command(name, grantname, grantprivstr)
+	end,
+})
+
+core.register_chatcommand("grantme", {
+	params = "<privilege>|all",
+	description = "Grant privileges to yourself",
+	func = function(name, param)
+		if param == "" then
+			return false, "Invalid parameters (see /help grantme)"
+		end	
+		return handle_grant_command(name, name, param)
 	end,
 })
+
 core.register_chatcommand("revoke", {
 	params = "<name> <privilege>|all",
 	description = "Remove privilege from player",
diff --git a/builtin/game/constants.lua b/builtin/game/constants.lua
index d0b7c753c..50c515b24 100644
--- a/builtin/game/constants.lua
+++ b/builtin/game/constants.lua
@@ -4,14 +4,24 @@
 -- Constants values for use with the Lua API
 --
 
+-- mapnode.h
 -- Built-in Content IDs (for use with VoxelManip API)
 core.CONTENT_UNKNOWN = 125
 core.CONTENT_AIR     = 126
 core.CONTENT_IGNORE  = 127
 
+-- emerge.h
 -- Block emerge status constants (for use with core.emerge_area)
 core.EMERGE_CANCELLED   = 0
 core.EMERGE_ERRORED     = 1
 core.EMERGE_FROM_MEMORY = 2
 core.EMERGE_FROM_DISK   = 3
 core.EMERGE_GENERATED   = 4
+
+-- constants.h
+-- Size of mapblocks in nodes
+core.MAP_BLOCKSIZE = 16
+
+-- light.h
+-- Maximum value for node 'light_source' parameter
+core.LIGHT_MAX = 14
diff --git a/builtin/game/detached_inventory.lua b/builtin/game/detached_inventory.lua
index b5d106b04..420e89ff2 100644
--- a/builtin/game/detached_inventory.lua
+++ b/builtin/game/detached_inventory.lua
@@ -2,7 +2,7 @@
 
 core.detached_inventories = {}
 
-function core.create_detached_inventory(name, callbacks)
+function core.create_detached_inventory(name, callbacks, player_name)
 	local stuff = {}
 	stuff.name = name
 	if callbacks then
@@ -15,6 +15,6 @@ function core.create_detached_inventory(name, callbacks)
 	end
 	stuff.mod_origin = core.get_current_modname() or "??"
 	core.detached_inventories[name] = stuff
-	return core.create_detached_inventory_raw(name)
+	return core.create_detached_inventory_raw(name, player_name)
 end
 
diff --git a/builtin/game/falling.lua b/builtin/game/falling.lua
index 57bb98cfd..4696ce481 100644
--- a/builtin/game/falling.lua
+++ b/builtin/game/falling.lua
@@ -1,5 +1,7 @@
 -- Minetest: builtin/item.lua
 
+local builtin_shared = ...
+
 --
 -- Falling stuff
 --
@@ -41,19 +43,20 @@ core.register_entity(":__builtin:falling_node", {
 	end,
 
 	on_step = function(self, dtime)
-		 -- Set gravity
+		-- Set gravity
 		local acceleration = self.object:getacceleration()
 		if not vector.equals(acceleration, {x = 0, y = -10, z = 0}) then
 			self.object:setacceleration({x = 0, y = -10, z = 0})
 		end
-		-- Turn to actual sand when collides to ground or just move
+		-- Turn to actual node when colliding with ground, or continue to move
 		local pos = self.object:getpos()
-		local bcp = {x = pos.x, y = pos.y - 0.7, z = pos.z} -- Position of bottom center point
-		local bcn = core.get_node(bcp)
-		local bcd = core.registered_nodes[bcn.name]
-		-- Note: walkable is in the node definition, not in item groups
-		if not bcd or
-				(bcd.walkable or
+		-- Position of bottom center point
+		local bcp = {x = pos.x, y = pos.y - 0.7, z = pos.z}
+		-- Avoid bugs caused by an unloaded node below
+		local bcn = core.get_node_or_nil(bcp)
+		local bcd = bcn and core.registered_nodes[bcn.name]
+		if bcn and
+				(not bcd or bcd.walkable or
 				(core.get_item_group(self.node.name, "float") ~= 0 and
 				bcd.liquidtype ~= "none")) then
 			if bcd and bcd.leveled and
@@ -75,20 +78,20 @@ core.register_entity(":__builtin:falling_node", {
 			local np = {x = bcp.x, y = bcp.y + 1, z = bcp.z}
 			-- Check what's here
 			local n2 = core.get_node(np)
+			local nd = core.registered_nodes[n2.name]
 			-- If it's not air or liquid, remove node and replace it with
 			-- it's drops
-			if n2.name ~= "air" and (not core.registered_nodes[n2.name] or
-					core.registered_nodes[n2.name].liquidtype == "none") then
+			if n2.name ~= "air" and (not nd or nd.liquidtype == "none") then
 				core.remove_node(np)
-				if core.registered_nodes[n2.name].buildable_to == false then
+				if nd.buildable_to == false then
 					-- Add dropped items
 					local drops = core.get_node_drops(n2.name, "")
-					for _, dropped_item in ipairs(drops) do
+					for _, dropped_item in pairs(drops) do
 						core.add_item(np, dropped_item)
 					end
 				end
 				-- Run script hook
-				for _, callback in ipairs(core.registered_on_dignodes) do
+				for _, callback in pairs(core.registered_on_dignodes) do
 					callback(np, n2)
 				end
 			end
@@ -97,7 +100,7 @@ core.register_entity(":__builtin:falling_node", {
 				core.add_node(np, self.node)
 			end
 			self.object:remove()
-			nodeupdate(np)
+			core.check_for_falling(np)
 			return
 		end
 		local vel = self.object:getvelocity()
@@ -108,15 +111,17 @@ core.register_entity(":__builtin:falling_node", {
 	end
 })
 
-function spawn_falling_node(p, node)
+local function spawn_falling_node(p, node)
 	local obj = core.add_entity(p, "__builtin:falling_node")
-	obj:get_luaentity():set_node(node)
+	if obj then
+		obj:get_luaentity():set_node(node)
+	end
 end
 
-function drop_attached_node(p)
+local function drop_attached_node(p)
 	local nn = core.get_node(p).name
 	core.remove_node(p)
-	for _, item in ipairs(core.get_node_drops(nn, "")) do
+	for _, item in pairs(core.get_node_drops(nn, "")) do
 		local pos = {
 			x = p.x + math.random()/2 - 0.25,
 			y = p.y + math.random()/2 - 0.25,
@@ -126,11 +131,15 @@ function drop_attached_node(p)
 	end
 end
 
-function check_attached_node(p, n)
+function builtin_shared.check_attached_node(p, n)
 	local def = core.registered_nodes[n.name]
 	local d = {x = 0, y = 0, z = 0}
 	if def.paramtype2 == "wallmounted" then
-		d = core.wallmounted_to_dir(n.param2)
+		-- The fallback vector here is in case 'wallmounted to dir' is nil due
+		-- to voxelmanip placing a wallmounted node without resetting a
+		-- pre-existing param2 value that is out-of-range for wallmounted.
+		-- The fallback vector corresponds to param2 = 0.
+		d = core.wallmounted_to_dir(n.param2) or {x = 0, y = 1, z = 0}
 	else
 		d.y = -1
 	end
@@ -147,19 +156,23 @@ end
 -- Some common functions
 --
 
-function nodeupdate_single(p)
+function core.check_single_for_falling(p)
 	local n = core.get_node(p)
 	if core.get_item_group(n.name, "falling_node") ~= 0 then
 		local p_bottom = {x = p.x, y = p.y - 1, z = p.z}
-		local n_bottom = core.get_node(p_bottom)
-		-- Note: walkable is in the node definition, not in item groups
-		if core.registered_nodes[n_bottom.name] and
+		-- Only spawn falling node if node below is loaded
+		local n_bottom = core.get_node_or_nil(p_bottom)
+		local d_bottom = n_bottom and core.registered_nodes[n_bottom.name]
+		if d_bottom and
+
 				(core.get_item_group(n.name, "float") == 0 or
-					core.registered_nodes[n_bottom.name].liquidtype == "none") and
-				(n.name ~= n_bottom.name or (core.registered_nodes[n_bottom.name].leveled and
-					core.get_node_level(p_bottom) < core.get_node_max_level(p_bottom))) and
-				(not core.registered_nodes[n_bottom.name].walkable or
-					core.registered_nodes[n_bottom.name].buildable_to) then
+				d_bottom.liquidtype == "none") and
+
+				(n.name ~= n_bottom.name or (d_bottom.leveled and
+				core.get_node_level(p_bottom) <
+				core.get_node_max_level(p_bottom))) and
+
+				(not d_bottom.walkable or d_bottom.buildable_to) then
 			n.level = core.get_node_level(p)
 			core.remove_node(p)
 			spawn_falling_node(p, n)
@@ -168,7 +181,7 @@ function nodeupdate_single(p)
 	end
 
 	if core.get_item_group(n.name, "attached_node") ~= 0 then
-		if not check_attached_node(p, n) then
+		if not builtin_shared.check_attached_node(p, n) then
 			drop_attached_node(p)
 			return true
 		end
@@ -181,7 +194,7 @@ end
 -- We don't walk diagonals, only our direct neighbors, and self.
 -- Down first as likely case, but always before self. The same with sides.
 -- Up must come last, so that things above self will also fall all at once.
-local nodeupdate_neighbors = {
+local check_for_falling_neighbors = {
 	{x = -1, y = -1, z = 0},
 	{x = 1, y = -1, z = 0},
 	{x = 0, y = -1, z = -1},
@@ -195,7 +208,7 @@ local nodeupdate_neighbors = {
 	{x = 0, y = 1, z = 0},
 }
 
-function nodeupdate(p)
+function core.check_for_falling(p)
 	-- Round p to prevent falling entities to get stuck.
 	p = vector.round(p)
 
@@ -214,10 +227,10 @@ function nodeupdate(p)
 		n = n + 1
 		s[n] = {p = p, v = v}
 		-- Select next node from neighbor list.
-		p = vector.add(p, nodeupdate_neighbors[v])
+		p = vector.add(p, check_for_falling_neighbors[v])
 		-- Now we check out the node. If it is in need of an update,
 		-- it will let us know in the return value (true = updated).
-		if not nodeupdate_single(p) then
+		if not core.check_single_for_falling(p) then
 			-- If we don't need to "recurse" (walk) to it then pop
 			-- our previous pos off the stack and continue from there,
 			-- with the v value we were at when we last were at that
@@ -249,12 +262,33 @@ end
 -- Global callbacks
 --
 
-function on_placenode(p, node)
-	nodeupdate(p)
+local function on_placenode(p, node)
+	core.check_for_falling(p)
 end
 core.register_on_placenode(on_placenode)
 
-function on_dignode(p, node)
-	nodeupdate(p)
+local function on_dignode(p, node)
+	core.check_for_falling(p)
 end
 core.register_on_dignode(on_dignode)
+
+local function on_punchnode(p, node)
+	core.check_for_falling(p)
+end
+core.register_on_punchnode(on_punchnode)
+
+--
+-- Globally exported functions
+--
+
+-- TODO remove this function after the 0.4.15 release
+function nodeupdate(p)
+	core.log("deprecated", "nodeupdate: deprecated, please use core.check_for_falling instead")
+	core.check_for_falling(p)
+end
+
+-- TODO remove this function after the 0.4.15 release
+function nodeupdate_single(p)
+	core.log("deprecated", "nodeupdate_single: deprecated, please use core.check_single_for_falling instead")
+	core.check_single_for_falling(p)
+end
diff --git a/builtin/game/forceloading.lua b/builtin/game/forceloading.lua
index 8c9fbf512..8a05de36c 100644
--- a/builtin/game/forceloading.lua
+++ b/builtin/game/forceloading.lua
@@ -5,9 +5,10 @@ core.forceload_block = nil
 core.forceload_free_block = nil
 
 local blocks_forceloaded
+local blocks_temploaded = {}
 local total_forceloaded = 0
 
-local BLOCKSIZE = 16
+local BLOCKSIZE = core.MAP_BLOCKSIZE
 local function get_blockpos(pos)
 	return {
 		x = math.floor(pos.x/BLOCKSIZE),
@@ -15,32 +16,52 @@ local function get_blockpos(pos)
 		z = math.floor(pos.z/BLOCKSIZE)}
 end
 
-function core.forceload_block(pos)
+-- When we create/free a forceload, it's either transient or persistent. We want
+-- to add to/remove from the table that corresponds to the type of forceload, but
+-- we also need the other table because whether we forceload a block depends on
+-- both tables.
+-- This function returns the "primary" table we are adding to/removing from, and
+-- the other table.
+local function get_relevant_tables(transient)
+	if transient then
+		return blocks_temploaded, blocks_forceloaded
+	else
+		return blocks_forceloaded, blocks_temploaded
+	end
+end
+
+function core.forceload_block(pos, transient)
 	local blockpos = get_blockpos(pos)
 	local hash = core.hash_node_position(blockpos)
-	if blocks_forceloaded[hash] ~= nil then
-		blocks_forceloaded[hash] = blocks_forceloaded[hash] + 1
+	local relevant_table, other_table = get_relevant_tables(transient)
+	if relevant_table[hash] ~= nil then
+		relevant_table[hash] = relevant_table[hash] + 1
 		return true
+	elseif other_table[hash] ~= nil then
+		relevant_table[hash] = 1
 	else
 		if total_forceloaded >= (tonumber(core.setting_get("max_forceloaded_blocks")) or 16) then
 			return false
 		end
 		total_forceloaded = total_forceloaded+1
-		blocks_forceloaded[hash] = 1
+		relevant_table[hash] = 1
 		forceload_block(blockpos)
 		return true
 	end
 end
 
-function core.forceload_free_block(pos)
+function core.forceload_free_block(pos, transient)
 	local blockpos = get_blockpos(pos)
 	local hash = core.hash_node_position(blockpos)
-	if blocks_forceloaded[hash] == nil then return end
-	if blocks_forceloaded[hash] > 1 then
-		blocks_forceloaded[hash] = blocks_forceloaded[hash] - 1
+	local relevant_table, other_table = get_relevant_tables(transient)
+	if relevant_table[hash] == nil then return end
+	if relevant_table[hash] > 1 then
+		relevant_table[hash] = relevant_table[hash] - 1
+	elseif other_table[hash] ~= nil then
+		relevant_table[hash] = nil
 	else
 		total_forceloaded = total_forceloaded-1
-		blocks_forceloaded[hash] = nil
+		relevant_table[hash] = nil
 		forceload_free_block(blockpos)
 	end
 end
diff --git a/builtin/game/init.lua b/builtin/game/init.lua
index a6cfa3bf8..b5e2f7cca 100644
--- a/builtin/game/init.lua
+++ b/builtin/game/init.lua
@@ -3,14 +3,18 @@ local scriptpath = core.get_builtin_path()..DIR_DELIM
 local commonpath = scriptpath.."common"..DIR_DELIM
 local gamepath = scriptpath.."game"..DIR_DELIM
 
+-- Shared between builtin files, but
+-- not exposed to outer context
+local builtin_shared = {}
+
 dofile(commonpath.."vector.lua")
 
 dofile(gamepath.."constants.lua")
-dofile(gamepath.."item.lua")
+assert(loadfile(gamepath.."item.lua"))(builtin_shared)
 dofile(gamepath.."register.lua")
 
-if core.setting_getbool("mod_profiling") then
-	dofile(gamepath.."mod_profiling.lua")
+if core.setting_getbool("profiler.load") then
+	profiler = dofile(scriptpath.."profiler"..DIR_DELIM.."init.lua")
 end
 
 dofile(gamepath.."item_entity.lua")
@@ -21,8 +25,10 @@ dofile(gamepath.."auth.lua")
 dofile(gamepath.."chatcommands.lua")
 dofile(gamepath.."static_spawn.lua")
 dofile(gamepath.."detached_inventory.lua")
-dofile(gamepath.."falling.lua")
+assert(loadfile(gamepath.."falling.lua"))(builtin_shared)
 dofile(gamepath.."features.lua")
 dofile(gamepath.."voxelarea.lua")
 dofile(gamepath.."forceloading.lua")
 dofile(gamepath.."statbars.lua")
+
+profiler = nil
diff --git a/builtin/game/item.lua b/builtin/game/item.lua
index 36c2c1a68..bf456a4e0 100644
--- a/builtin/game/item.lua
+++ b/builtin/game/item.lua
@@ -1,5 +1,7 @@
 -- Minetest: builtin/item.lua
 
+local builtin_shared = ...
+
 local function copy_pointed_thing(pointed_thing)
 	return {
 		type  = pointed_thing.type,
@@ -250,7 +252,9 @@ function core.item_place_node(itemstack, placer, pointed_thing, param2)
 	local newnode = {name = def.name, param1 = 0, param2 = param2}
 
 	-- Calculate direction for wall mounted stuff like torches and signs
-	if def.paramtype2 == 'wallmounted' and not param2 then
+	if def.place_param2 ~= nil then
+		newnode.param2 = def.place_param2
+	elseif def.paramtype2 == 'wallmounted' and not param2 then
 		local dir = {
 			x = under.x - above.x,
 			y = under.y - above.y,
@@ -273,7 +277,7 @@ function core.item_place_node(itemstack, placer, pointed_thing, param2)
 
 	-- Check if the node is attached and if it can be placed there
 	if core.get_item_group(def.name, "attached_node") ~= 0 and
-		not check_attached_node(place_to, newnode) then
+		not builtin_shared.check_attached_node(place_to, newnode) then
 		core.log("action", "attached node " .. def.name ..
 			" can not be placed at " .. core.pos_to_string(place_to))
 		return itemstack, false
@@ -470,6 +474,9 @@ function core.node_dig(pos, node, digger)
 		-- Wear out tool
 		if not core.setting_getbool("creative_mode") then
 			wielded:add_wear(dp.wear)
+			if wielded:get_count() == 0 and wdef.sound and wdef.sound.breaks then
+				core.sound_play(wdef.sound.breaks, {pos = pos, gain = 0.5})
+			end
 		end
 	end
 	digger:set_wielded_item(wielded)
diff --git a/builtin/game/item_entity.lua b/builtin/game/item_entity.lua
index a66bf33d0..be158c119 100644
--- a/builtin/game/item_entity.lua
+++ b/builtin/game/item_entity.lua
@@ -31,7 +31,6 @@ core.register_entity(":__builtin:item", {
 		spritediv = {x = 1, y = 1},
 		initial_sprite_basepos = {x = 0, y = 0},
 		is_visible = false,
-		infotext = "",
 	},
 
 	itemstring = '',
@@ -51,7 +50,6 @@ core.register_entity(":__builtin:item", {
 		local c = s
 		local itemtable = stack:to_table()
 		local itemname = nil
-		local description = ""
 		if itemtable then
 			itemname = stack:to_table().name
 		end
@@ -60,7 +58,6 @@ core.register_entity(":__builtin:item", {
 		if core.registered_items[itemname] then
 			item_texture = core.registered_items[itemname].inventory_image
 			item_type = core.registered_items[itemname].type
-			description = core.registered_items[itemname].description
 		end
 		local prop = {
 			is_visible = true,
@@ -69,7 +66,6 @@ core.register_entity(":__builtin:item", {
 			visual_size = {x = s, y = s},
 			collisionbox = {-c, -c, -c, c, c, c},
 			automatic_rotate = math.pi * 0.5,
-			infotext = description,
 		}
 		self.object:set_properties(prop)
 	end,
diff --git a/builtin/game/misc.lua b/builtin/game/misc.lua
index de41cfc91..7caa9e7ba 100644
--- a/builtin/game/misc.lua
+++ b/builtin/game/misc.lua
@@ -38,7 +38,7 @@ core.register_globalstep(function(dtime)
 end)
 
 function core.after(after, func, ...)
-	assert(tonumber(time) and type(func) == "function",
+	assert(tonumber(after) and type(func) == "function",
 			"Invalid core.after invocation")
 	jobs[#jobs + 1] = {
 		func = func,
@@ -48,11 +48,13 @@ function core.after(after, func, ...)
 	}
 end
 
-function core.check_player_privs(player_or_name, ...)
-	local name = player_or_name
-	-- Check if we have been provided with a Player object.
-	if type(name) ~= "string" then
+function core.check_player_privs(name, ...)
+	local arg_type = type(name)
+	if (arg_type == "userdata" or arg_type == "table") and
+			name.get_player_name then -- If it quacks like a Player...
 		name = name:get_player_name()
+	elseif arg_type ~= "string" then
+		error("Invalid core.check_player_privs argument type: " .. arg_type, 2)
 	end
 	
 	local requested_privs = {...}
@@ -85,11 +87,21 @@ end
 local player_list = {}
 
 core.register_on_joinplayer(function(player)
-	player_list[player:get_player_name()] = player
+	local player_name = player:get_player_name()
+	player_list[player_name] = player
+	if not minetest.is_singleplayer() then
+		core.chat_send_all("*** " .. player_name .. " joined the game.")
+	end
 end)
 
-core.register_on_leaveplayer(function(player)
-	player_list[player:get_player_name()] = nil
+core.register_on_leaveplayer(function(player, timed_out)
+	local player_name = player:get_player_name()
+	player_list[player_name] = nil
+	local announcement = "*** " ..  player_name .. " left the game."
+	if timed_out then
+		announcement = announcement .. " (timed out)"
+	end
+	core.chat_send_all(announcement)
 end)
 
 function core.get_connected_players()
@@ -197,3 +209,39 @@ function core.http_add_fetch(httpenv)
 
 	return httpenv
 end
+
+if minetest.setting_getbool("disable_escape_sequences") then
+
+	function core.get_color_escape_sequence(color)
+		return ""
+	end
+
+	function core.get_background_escape_sequence(color)
+		return ""
+	end
+
+	function core.colorize(color, message)
+		return message
+	end
+
+else
+
+	local ESCAPE_CHAR = string.char(0x1b)
+	function core.get_color_escape_sequence(color)
+		return ESCAPE_CHAR .. "(c@" .. color .. ")"
+	end
+
+	function core.get_background_escape_sequence(color)
+		return ESCAPE_CHAR .. "(b@" .. color .. ")"
+	end
+
+	function core.colorize(color, message)
+		return core.get_color_escape_sequence(color) .. message .. core.get_color_escape_sequence("#ffffff")
+	end
+
+end
+
+function core.close_formspec(player_name, formname)
+	return minetest.show_formspec(player_name, formname, "")
+end
+
diff --git a/builtin/game/mod_profiling.lua b/builtin/game/mod_profiling.lua
deleted file mode 100644
index df2d10221..000000000
--- a/builtin/game/mod_profiling.lua
+++ /dev/null
@@ -1,356 +0,0 @@
--- Minetest: builtin/game/mod_profiling.lua
-
-local mod_statistics = {}
-mod_statistics.step_total = 0
-mod_statistics.data = {}
-mod_statistics.stats = {}
-mod_statistics.stats["total"] = {
-	min_us = math.huge,
-	max_us = 0,
-	avg_us = 0,
-	min_per = 100,
-	max_per = 100,
-	avg_per = 100
-}
-
-local replacement_table = {
-	"register_globalstep",
-	"register_on_placenode",
-	"register_on_dignode",
-	"register_on_punchnode",
-	"register_on_generated",
-	"register_on_newplayer",
-	"register_on_dieplayer",
-	"register_on_respawnplayer",
-	"register_on_prejoinplayer",
-	"register_on_joinplayer",
-	"register_on_leaveplayer",
-	"register_on_cheat",
-	"register_on_chat_message",
-	"register_on_player_receive_fields",
-	"register_on_mapgen_init",
-	"register_on_craft",
-	"register_craft_predict",
-	"register_on_item_eat"
-}
-
---------------------------------------------------------------------------------
-function mod_statistics.log_time(type, modname, time_in_us)
-
-	if modname == nil then
-		modname = "builtin"
-	end
-	
-	if mod_statistics.data[modname] == nil then
-		mod_statistics.data[modname] = {}
-	end
-	
-	if mod_statistics.data[modname][type] == nil then
-		mod_statistics.data[modname][type] = 0
-	end
-	
-	mod_statistics.data[modname][type] =
-		mod_statistics.data[modname][type] + time_in_us
-	mod_statistics.step_total = mod_statistics.step_total + time_in_us
-end
-
---------------------------------------------------------------------------------
-function mod_statistics.update_statistics(dtime)
-	for modname,types in pairs(mod_statistics.data) do
-		
-		if mod_statistics.stats[modname] == nil then
-			mod_statistics.stats[modname] = {
-				min_us = math.huge,
-				max_us = 0,
-				avg_us = 0,
-				min_per = 100,
-				max_per = 0,
-				avg_per = 0
-			}
-		end
-		
-		local modtime = 0
-		for type,time in pairs(types) do
-			modtime = modtime + time
-			if mod_statistics.stats[modname].types == nil then
-				mod_statistics.stats[modname].types = {}
-			end
-			if mod_statistics.stats[modname].types[type] == nil then
-				mod_statistics.stats[modname].types[type] = {
-					min_us = math.huge,
-					max_us = 0,
-					avg_us = 0,
-					min_per = 100,
-					max_per = 0,
-					avg_per = 0
-				}
-			end
-			
-			local toupdate = mod_statistics.stats[modname].types[type]
-			
-			--update us values
-			toupdate.min_us = math.min(time, toupdate.min_us)
-			toupdate.max_us = math.max(time, toupdate.max_us)
-			--TODO find better algorithm
-			toupdate.avg_us = toupdate.avg_us * 0.99 + modtime * 0.01
-				
-			--update percentage values
-			local cur_per = (time/mod_statistics.step_total) * 100
-			toupdate.min_per = math.min(toupdate.min_per, cur_per)
-				
-			toupdate.max_per = math.max(toupdate.max_per, cur_per)
-				
-			--TODO find better algorithm
-			toupdate.avg_per = toupdate.avg_per * 0.99 + cur_per * 0.01
-			
-			mod_statistics.data[modname][type] = 0
-		end
-		
-		--per mod statistics
-		--update us values
-		mod_statistics.stats[modname].min_us =
-			math.min(modtime, mod_statistics.stats[modname].min_us)
-		mod_statistics.stats[modname].max_us =
-			math.max(modtime, mod_statistics.stats[modname].max_us)
-		--TODO find better algorithm
-		mod_statistics.stats[modname].avg_us =
-			mod_statistics.stats[modname].avg_us * 0.99 + modtime * 0.01
-			
-		--update percentage values
-		local cur_per = (modtime/mod_statistics.step_total) * 100
-		mod_statistics.stats[modname].min_per =
-			math.min(mod_statistics.stats[modname].min_per, cur_per)
-			
-		mod_statistics.stats[modname].max_per =
-			math.max(mod_statistics.stats[modname].max_per, cur_per)
-			
-		--TODO find better algorithm
-		mod_statistics.stats[modname].avg_per =
-			mod_statistics.stats[modname].avg_per * 0.99 + cur_per * 0.01
-	end
-	
-	--update "total"
-	mod_statistics.stats["total"].min_us =
-		math.min(mod_statistics.step_total, mod_statistics.stats["total"].min_us)
-	mod_statistics.stats["total"].max_us =
-		math.max(mod_statistics.step_total, mod_statistics.stats["total"].max_us)
-	--TODO find better algorithm
-	mod_statistics.stats["total"].avg_us =
-		mod_statistics.stats["total"].avg_us * 0.99 +
-		mod_statistics.step_total * 0.01
-	
-	mod_statistics.step_total = 0
-end
-
---------------------------------------------------------------------------------
-local function build_callback(log_id, fct)
-	return function( toregister )
-		local modname = core.get_current_modname()
-		
-		fct(function(...)
-			local starttime = core.get_us_time()
-			-- note maximum 10 return values are supported unless someone finds
-			-- a way to store a variable lenght return value list
-			local r0, r1, r2, r3, r4, r5, r6, r7, r8, r9 = toregister(...)
-			local delta = core.get_us_time() - starttime
-			mod_statistics.log_time(log_id, modname, delta)
-			return r0, r1, r2, r3, r4, r5, r6, r7, r8, r9
-			end
-		)
-	end
-end
-
---------------------------------------------------------------------------------
-function profiling_print_log(cmd, filter)
-
-	print("Filter:" .. dump(filter))
-
-	core.log("action", "Values below show times/percentages per server step.")
-	core.log("action", "Following suffixes are used for entities:")
-	core.log("action", "\t#oa := on_activate, #os := on_step, #op := on_punch, #or := on_rightclick, #gs := get_staticdata")
-	core.log("action",
-		string.format("%16s | %25s | %10s | %10s | %10s | %9s | %9s | %9s",
-		"modname", "type" , "min µs", "max µs", "avg µs", "min %", "max %", "avg %")
-	)
-	core.log("action",
-		"-----------------+---------------------------+-----------+" ..
-		"-----------+-----------+-----------+-----------+-----------")
-	for modname,statistics in pairs(mod_statistics.stats) do
-		if modname ~= "total" then
-		
-			if (filter == "") or (modname == filter) then
-				if modname:len() > 16 then
-					modname = "..." .. modname:sub(-13)
-				end
-			
-				core.log("action",
-					string.format("%16s | %25s | %9d | %9d | %9d | %9d | %9d | %9d",
-					modname,
-					" ",
-					statistics.min_us,
-					statistics.max_us,
-					statistics.avg_us,
-					statistics.min_per,
-					statistics.max_per,
-					statistics.avg_per)
-				)
-				if core.setting_getbool("detailed_profiling") then
-					if statistics.types ~= nil then
-						for type,typestats in pairs(statistics.types) do
-						
-							if type:len() > 25 then
-								type = "..." .. type:sub(-22)
-							end
-						
-							core.log("action",
-								string.format(
-								"%16s | %25s | %9d | %9d | %9d | %9d | %9d | %9d",
-								" ",
-								type,
-								typestats.min_us,
-								typestats.max_us,
-								typestats.avg_us,
-								typestats.min_per,
-								typestats.max_per,
-								typestats.avg_per)
-							)
-						end
-					end
-				end
-			end
-		end
-	end
-		core.log("action",
-			"-----------------+---------------------------+-----------+" ..
-			"-----------+-----------+-----------+-----------+-----------")
-			
-	if filter == "" then
-		core.log("action",
-			string.format("%16s | %25s | %9d | %9d | %9d | %9d | %9d | %9d",
-			"total",
-			" ",
-			mod_statistics.stats["total"].min_us,
-			mod_statistics.stats["total"].max_us,
-			mod_statistics.stats["total"].avg_us,
-			mod_statistics.stats["total"].min_per,
-			mod_statistics.stats["total"].max_per,
-			mod_statistics.stats["total"].avg_per)
-		)
-	end
-	core.log("action", " ")
-	
-	return true
-end
-
---------------------------------------------------------------------------------
-local function initialize_profiling()
-	core.log("action", "Initialize tracing")
-	
-	mod_statistics.entity_callbacks = {}
-	
-	-- first register our own globalstep handler
-	core.register_globalstep(mod_statistics.update_statistics)
-	
-	local rp_register_entity = core.register_entity
-	core.register_entity = function(name, prototype)
-		local modname = core.get_current_modname()
-		local new_on_activate = nil
-		local new_on_step = nil
-		local new_on_punch = nil
-		local new_rightclick = nil
-		local new_get_staticdata = nil
-		
-		if prototype.on_activate ~= nil then
-			local cbid = name .. "#oa"
-			mod_statistics.entity_callbacks[cbid] = prototype.on_activate
-			new_on_activate = function(self, staticdata, dtime_s)
-				local starttime = core.get_us_time()
-				mod_statistics.entity_callbacks[cbid](self, staticdata, dtime_s)
-				local delta = core.get_us_time() -starttime
-				mod_statistics.log_time(cbid, modname, delta)
-			end
-		end
-		
-		if prototype.on_step ~= nil then
-			local cbid = name .. "#os"
-			mod_statistics.entity_callbacks[cbid] = prototype.on_step
-			new_on_step = function(self, dtime)
-				local starttime = core.get_us_time()
-				mod_statistics.entity_callbacks[cbid](self, dtime)
-				local delta = core.get_us_time() -starttime
-				mod_statistics.log_time(cbid, modname, delta)
-			end
-		end
-	
-		if prototype.on_punch ~= nil then
-			local cbid = name .. "#op"
-			mod_statistics.entity_callbacks[cbid] = prototype.on_punch
-			new_on_punch = function(self, hitter)
-				local starttime = core.get_us_time()
-				mod_statistics.entity_callbacks[cbid](self, hitter)
-				local delta = core.get_us_time() -starttime
-				mod_statistics.log_time(cbid, modname, delta)
-			end
-		end
-		
-		if prototype.rightclick ~= nil then
-			local cbid = name .. "#rc"
-			mod_statistics.entity_callbacks[cbid] = prototype.rightclick
-			new_rightclick = function(self, clicker)
-				local starttime = core.get_us_time()
-				mod_statistics.entity_callbacks[cbid](self, clicker)
-				local delta = core.get_us_time() -starttime
-				mod_statistics.log_time(cbid, modname, delta)
-			end
-		end
-		
-		if prototype.get_staticdata ~= nil then
-			local cbid = name .. "#gs"
-			mod_statistics.entity_callbacks[cbid] = prototype.get_staticdata
-			new_get_staticdata = function(self)
-				local starttime = core.get_us_time()
-				local retval = mod_statistics.entity_callbacks[cbid](self)
-				local delta = core.get_us_time() -starttime
-				mod_statistics.log_time(cbid, modname, delta)
-				return retval
-			end
-		end
-	
-		prototype.on_activate = new_on_activate
-		prototype.on_step = new_on_step
-		prototype.on_punch = new_on_punch
-		prototype.rightclick = new_rightclick
-		prototype.get_staticdata = new_get_staticdata
-		
-		rp_register_entity(name,prototype)
-	end
-	
-	for i,v in ipairs(replacement_table) do
-		local to_replace = core[v]
-		core[v] = build_callback(v, to_replace)
-	end
-	
-	local rp_register_abm = core.register_abm
-	core.register_abm = function(spec)
-	
-		local modname = core.get_current_modname()
-	
-		local replacement_spec = {
-			nodenames = spec.nodenames,
-			neighbors = spec.neighbors,
-			interval  = spec.interval,
-			chance    = spec.chance,
-			action = function(pos, node, active_object_count, active_object_count_wider)
-				local starttime = core.get_us_time()
-				spec.action(pos, node, active_object_count, active_object_count_wider)
-				local delta = core.get_us_time() - starttime
-				mod_statistics.log_time("abm", modname, delta)
-			end
-		}
-		rp_register_abm(replacement_spec)
-	end
-	
-	core.log("action", "Mod profiling initialized")
-end
-
-initialize_profiling()
diff --git a/builtin/game/privileges.lua b/builtin/game/privileges.lua
index bd5ead624..56e090f4c 100644
--- a/builtin/game/privileges.lua
+++ b/builtin/game/privileges.lua
@@ -26,18 +26,46 @@ function core.register_privilege(name, param)
 end
 
 core.register_privilege("interact", "Can interact with things and modify the world")
-core.register_privilege("teleport", "Can use /teleport command")
-core.register_privilege("bring", "Can teleport other players")
-core.register_privilege("settime", "Can use /time")
-core.register_privilege("privs", "Can modify privileges")
-core.register_privilege("basic_privs", "Can modify 'shout' and 'interact' privileges")
-core.register_privilege("server", "Can do server maintenance stuff")
-core.register_privilege("protection_bypass", "Can bypass node protection in the world")
 core.register_privilege("shout", "Can speak in chat")
-core.register_privilege("ban", "Can ban and unban players")
-core.register_privilege("kick", "Can kick players")
-core.register_privilege("give", "Can use /give and /giveme")
-core.register_privilege("password", "Can use /setpassword and /clearpassword")
+core.register_privilege("basic_privs", "Can modify 'shout' and 'interact' privileges")
+core.register_privilege("privs", "Can modify privileges")
+
+core.register_privilege("teleport", {
+	description = "Can use /teleport command",
+	give_to_singleplayer = false,
+})
+core.register_privilege("bring", {
+	description = "Can teleport other players",
+	give_to_singleplayer = false,
+})
+core.register_privilege("settime", {
+	description = "Can use /time",
+	give_to_singleplayer = false,
+})
+core.register_privilege("server", {
+	description = "Can do server maintenance stuff",
+	give_to_singleplayer = false,
+})
+core.register_privilege("protection_bypass", {
+	description = "Can bypass node protection in the world",
+	give_to_singleplayer = false,
+})
+core.register_privilege("ban", {
+	description = "Can ban and unban players",
+	give_to_singleplayer = false,
+})
+core.register_privilege("kick", {
+	description = "Can kick players",
+	give_to_singleplayer = false,
+})
+core.register_privilege("give", {
+	description = "Can use /give and /giveme",
+	give_to_singleplayer = false,
+})
+core.register_privilege("password", {
+	description = "Can use /setpassword and /clearpassword",
+	give_to_singleplayer = false,
+})
 core.register_privilege("fly", {
 	description = "Can fly using the free_move mode",
 	give_to_singleplayer = false,
@@ -50,5 +78,15 @@ core.register_privilege("noclip", {
 	description = "Can fly through walls",
 	give_to_singleplayer = false,
 })
-core.register_privilege("rollback", "Can use the rollback functionality")
-
+core.register_privilege("rollback", {
+	description = "Can use the rollback functionality",
+	give_to_singleplayer = false,
+})
+core.register_privilege("zoom", {
+	description = "Can zoom the camera",
+	give_to_singleplayer = false,
+})
+core.register_privilege("debug", {
+	description = "Allows enabling various debug options that may affect gameplay",
+	give_to_singleplayer = false,
+})
diff --git a/builtin/game/register.lua b/builtin/game/register.lua
index f330491a2..90f095e9f 100644
--- a/builtin/game/register.lua
+++ b/builtin/game/register.lua
@@ -7,6 +7,9 @@
 local register_item_raw = core.register_item_raw
 core.register_item_raw = nil
 
+local unregister_item_raw = core.unregister_item_raw
+core.unregister_item_raw = nil
+
 local register_alias_raw = core.register_alias_raw
 core.register_alias_raw = nil
 
@@ -124,6 +127,11 @@ function core.register_item(name, itemdef)
 				fixed = {-1/8, -1/2, -1/8, 1/8, 1/2, 1/8},
 			}
 		end
+		if itemdef.light_source and itemdef.light_source > core.LIGHT_MAX then
+			itemdef.light_source = core.LIGHT_MAX
+			core.log("warning", "Node 'light_source' value exceeds maximum," ..
+				" limiting to maximum: " ..name)
+		end
 		setmetatable(itemdef, {__index = core.nodedef_default})
 		core.registered_nodes[itemdef.name] = itemdef
 	elseif itemdef.type == "craft" then
@@ -172,6 +180,27 @@ function core.register_item(name, itemdef)
 	register_item_raw(itemdef)
 end
 
+function core.unregister_item(name)
+	if not core.registered_items[name] then
+		core.log("warning", "Not unregistering item " ..name..
+			" because it doesn't exist.")
+		return
+	end
+	-- Erase from registered_* table
+	local type = core.registered_items[name].type
+	if type == "node" then
+		core.registered_nodes[name] = nil
+	elseif type == "craft" then
+		core.registered_craftitems[name] = nil
+	elseif type == "tool" then
+		core.registered_tools[name] = nil
+	end
+	core.registered_items[name] = nil
+
+
+	unregister_item_raw(name)
+end
+
 function core.register_node(name, nodedef)
 	nodedef.type = "node"
 	core.register_item(name, nodedef)
@@ -242,6 +271,20 @@ function core.register_alias(name, convert_to)
 	end
 end
 
+function core.register_alias_force(name, convert_to)
+	if forbidden_item_names[name] then
+		error("Unable to register alias: Name is forbidden: " .. name)
+	end
+	if core.registered_items[name] ~= nil then
+		core.unregister_item(name)
+		core.log("info", "Removed item " ..name..
+			" while attempting to force add an alias")
+	end
+	--core.log("Registering alias: " .. name .. " -> " .. convert_to)
+	core.registered_aliases[name] = convert_to
+	register_alias_raw(name, convert_to)
+end
+
 function core.on_craft(itemstack, player, old_craft_list, craft_inv)
 	for _, func in ipairs(core.registered_on_crafts) do
 		itemstack = func(itemstack, player, old_craft_list, craft_inv) or itemstack
diff --git a/builtin/game/voxelarea.lua b/builtin/game/voxelarea.lua
index 6d926c940..724761414 100644
--- a/builtin/game/voxelarea.lua
+++ b/builtin/game/voxelarea.lua
@@ -50,7 +50,7 @@ end
 function VoxelArea:position(i)
 	local p = {}
 	local MinEdge = self.MinEdge
- 
+
 	i = i - 1
 
 	p.z = math.floor(i / self.zstride) + MinEdge.z
@@ -84,23 +84,46 @@ end
 
 function VoxelArea:iter(minx, miny, minz, maxx, maxy, maxz)
 	local i = self:index(minx, miny, minz) - 1
-	local last = self:index(maxx, maxy, maxz)
-	local ystride = self.ystride
-	local zstride = self.zstride
-	local yoff = (last+1) % ystride
-	local zoff = (last+1) % zstride
-	local ystridediff = (i - last) % ystride
-	local zstridediff = (i - last) % zstride
+	local xrange = maxx - minx + 1
+	local nextaction = i + 1 + xrange
+
+	local y = 0
+	local yrange = maxy - miny + 1
+	local yreqstride = self.ystride - xrange
+
+	local z = 0
+	local zrange = maxz - minz + 1
+	local multistride = self.zstride - ((yrange - 1) * self.ystride + xrange)
+
 	return function()
+		-- continue i until it needs to jump
 		i = i + 1
-		if i % zstride == zoff then
-			i = i + zstridediff
-		elseif i % ystride == yoff then
-			i = i + ystridediff
+		if i ~= nextaction then
+			return i
 		end
-		if i <= last then
+
+		-- continue y until maxy is exceeded
+		y = y + 1
+		if y ~= yrange then
+			-- set i to index(minx, miny + y, minz + z) - 1
+			i = i + yreqstride
+			nextaction = i + xrange
 			return i
 		end
+
+		-- continue z until maxz is exceeded
+		z = z + 1
+		if z == zrange then
+			-- cuboid finished, return nil
+			return
+		end
+
+		-- set i to index(minx, miny, minz + z) - 1
+		i = i + multistride
+
+		y = 0
+		nextaction = i + xrange
+		return i
 	end
 end
 
diff --git a/builtin/mainmenu/common.lua b/builtin/mainmenu/common.lua
index 1fd89ff77..da3667828 100644
--- a/builtin/mainmenu/common.lua
+++ b/builtin/mainmenu/common.lua
@@ -248,14 +248,18 @@ end
 
 --------------------------------------------------------------------------------
 function is_server_protocol_compat(server_proto_min, server_proto_max)
-	return min_supp_proto <= (server_proto_max or 24) and max_supp_proto >= (server_proto_min or 13)
+	if (not server_proto_min) or (not server_proto_max) then
+		-- There is no info. Assume the best and act as if we would be compatible.
+		return true
+	end
+	return min_supp_proto <= server_proto_max and max_supp_proto >= server_proto_min
 end
 --------------------------------------------------------------------------------
 function is_server_protocol_compat_or_error(server_proto_min, server_proto_max)
 	if not is_server_protocol_compat(server_proto_min, server_proto_max) then
 		local server_prot_ver_info, client_prot_ver_info
-		local s_p_min = server_proto_min or 13
-		local s_p_max = server_proto_max or 24
+		local s_p_min = server_proto_min
+		local s_p_max = server_proto_max
 
 		if s_p_min ~= s_p_max then
 			server_prot_ver_info = fgettext_ne("Server supports protocol versions between $1 and $2. ",
diff --git a/builtin/mainmenu/dlg_config_world.lua b/builtin/mainmenu/dlg_config_world.lua
index eb0319ba0..7b3ab9852 100644
--- a/builtin/mainmenu/dlg_config_world.lua
+++ b/builtin/mainmenu/dlg_config_world.lua
@@ -16,6 +16,9 @@
 --51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 --------------------------------------------------------------------------------
+
+local enabled_all = false 
+
 local function modname_valid(name)
 	return not name:find("[^a-z0-9_]")
 end
@@ -44,13 +47,18 @@ local function get_formspec(data)
 	if mod == nil then
 		mod = {name=""}
 	end
+
+	local hard_deps, soft_deps = modmgr.get_dependencies(mod.path)
 	
 	retval = retval ..
 		"label[0,0.7;" .. fgettext("Mod:") .. "]" ..
 		"label[0.75,0.7;" .. mod.name .. "]" ..
-		"label[0,1.25;" .. fgettext("Depends:") .. "]" ..
-		"textlist[0,1.75;5,4.25;world_config_depends;" ..
-		modmgr.get_dependencies(mod.path) .. ";0]" ..
+		"label[0,1.25;" .. fgettext("Dependencies:") .. "]" ..
+		"textlist[0,1.75;5,2.125;world_config_depends;" ..
+		hard_deps .. ";0]" ..
+		"label[0,3.875;" .. fgettext("Optional dependencies:") .. "]" ..
+		"textlist[0,4.375;5,1.8;world_config_optdepends;" ..
+		soft_deps .. ";0]" ..
 		"button[3.25,7;2.5,0.5;btn_config_world_save;" .. fgettext("Save") .. "]" ..
 		"button[5.75,7;2.5,0.5;btn_config_world_cancel;" .. fgettext("Cancel") .. "]"
 
@@ -80,11 +88,15 @@ local function get_formspec(data)
 			end
 		end
 	end
-
-	retval = retval ..
-		"button[8.75,0.125;2.5,0.5;btn_all_mods;" .. fgettext("Enable all") .. "]" ..
-		"textlist[5.5,0.75;5.75,5.25;world_config_modlist;"
-
+	if enabled_all then 
+		retval = retval ..
+			"button[8.75,0.125;2.5,0.5;btn_disable_all_mods;" .. fgettext("Disable all") .. "]" ..
+			"textlist[5.5,0.75;5.75,5.4;world_config_modlist;"
+	else
+		retval = retval ..
+			"button[8.75,0.125;2.5,0.5;btn_enable_all_mods;" .. fgettext("Enable all") .. "]" ..
+			"textlist[5.5,0.75;5.75,5.4;world_config_modlist;"
+	end
 	retval = retval .. modmgr.render_modlist(data.list)
 	retval = retval .. ";" .. data.selected_mod .."]"
 
@@ -229,15 +241,27 @@ local function handle_buttons(this, fields)
 		return true
 	end
 
-	if fields["btn_all_mods"] then
+	if fields.btn_enable_all_mods then
 		local list = this.data.list:get_raw_list()
 
-		for i=1,#list,1 do
-			if list[i].typ ~= "game_mod" and
-				not list[i].is_modpack then
+		for i = 1, #list do
+			if list[i].typ ~= "game_mod" and not list[i].is_modpack then
 				list[i].enabled = true
 			end
 		end
+		enabled_all = true
+		return true
+	end
+	
+	if fields.btn_disable_all_mods then
+		local list = this.data.list:get_raw_list()
+
+		for i = 1, #list do
+			if list[i].typ ~= "game_mod" and not list[i].is_modpack then
+				list[i].enabled = false
+			end
+		end
+		enabled_all = false
 		return true
 	end
 
diff --git a/builtin/mainmenu/dlg_settings_advanced.lua b/builtin/mainmenu/dlg_settings_advanced.lua
index f5e80c252..b0d923768 100644
--- a/builtin/mainmenu/dlg_settings_advanced.lua
+++ b/builtin/mainmenu/dlg_settings_advanced.lua
@@ -479,13 +479,13 @@ local function handle_change_setting_buttons(this, fields)
 				return true
 			end
 			if setting.min and new_value < setting.min then
-				this.data.error_message = fgettext_ne("The value must be greater than $1.", setting.min)
+				this.data.error_message = fgettext_ne("The value must be at least $1.", setting.min)
 				this.data.entered_text = fields["te_setting_value"]
 				core.update_formspec(this:get_formspec())
 				return true
 			end
 			if setting.max and new_value > setting.max then
-				this.data.error_message = fgettext_ne("The value must be lower than $1.", setting.max)
+				this.data.error_message = fgettext_ne("The value must not be larger than $1.", setting.max)
 				this.data.entered_text = fields["te_setting_value"]
 				core.update_formspec(this:get_formspec())
 				return true
@@ -659,102 +659,12 @@ function create_adv_settings_dlg()
 				return dlg
 end
 
-local function create_minetest_conf_example()
-	local result = "#    This file contains a list of all available settings and their default value for minetest.conf\n" ..
-			"\n" ..
-			"#    By default, all the settings are commented and not functional.\n" ..
-			"#    Uncomment settings by removing the preceding #.\n" ..
-			"\n" ..
-			"#    minetest.conf is read by default from:\n" ..
-			"#    ../minetest.conf\n" ..
-			"#    ../../minetest.conf\n" ..
-			"#    Any other path can be chosen by passing the path as a parameter\n" ..
-			"#    to the program, eg. \"minetest.exe --config ../minetest.conf.example\".\n" ..
-			"\n" ..
-			"#    Further documentation:\n" ..
-			"#    http://wiki.minetest.net/\n" ..
-			"\n"
-
-	local settings = parse_config_file(true, false)
-	for _, entry in ipairs(settings) do
-		if entry.type == "category" then
-			if entry.level == 0 then
-				result = result .. "#\n# " .. entry.name .. "\n#\n\n"
-			else
-				for i = 1, entry.level do
-					result = result .. "#"
-				end
-				result = result .. "# " .. entry.name .. "\n\n"
-			end
-		else
-			if entry.comment ~= "" then
-				for _, comment_line in ipairs(entry.comment:split("\n", true)) do
-					result = result .."#    " .. comment_line .. "\n"
-				end
-			end
-			result = result .. "#    type: " .. entry.type
-			if entry.min then
-				result = result .. " min: " .. entry.min
-			end
-			if entry.max then
-				result = result .. " max: " .. entry.max
-			end
-			if entry.values then
-				result = result .. " values: " .. table.concat(entry.values, ", ")
-			end
-			if entry.possible then
-				result = result .. " possible values: " .. entry.possible:gsub(",", ", ")
-			end
-			result = result .. "\n"
-			local append = ""
-			if entry.default ~= "" then
-				append = " " .. entry.default
-			end
-			result = result .. "# " .. entry.name .. " =" .. append .. "\n\n"
-		end
-	end
-	return result
-end
+-- Generate minetest.conf.example and settings_translation_file.cpp
 
-local function create_translation_file()
-	local result = "// This file is automatically generated\n" ..
-			"// It conatins a bunch of fake gettext calls, to tell xgettext about the strings in config files\n" ..
-			"// To update it, refer to the bottom of builtin/mainmenu/tab_settings.lua\n\n" ..
-			"fake_function() {\n"
+-- *** Please note ***
+-- There is text in minetest.conf.example that will not be generated from
+-- settingtypes.txt but must be preserved:
+-- The documentation of mapgen noise parameter formats (title plus 16 lines)
+-- Noise parameter 'mgv5_np_ground' in group format (13 lines)
 
-	local settings = parse_config_file(true, false)
-	for _, entry in ipairs(settings) do
-		if entry.type == "category" then
-			local name_escaped = entry.name:gsub("\"", "\\\"")
-			result = result .. "\tgettext(\"" .. name_escaped .. "\");\n"
-		else
-			if entry.readable_name then
-				local readable_name_escaped = entry.readable_name:gsub("\"", "\\\"")
-				result = result .. "\tgettext(\"" .. readable_name_escaped .. "\");\n"
-			end
-			if entry.comment ~= "" then
-				local comment_escaped = entry.comment:gsub("\n", "\\n")
-				comment_escaped = comment_escaped:gsub("\"", "\\\"")
-				result = result .. "\tgettext(\"" .. comment_escaped .. "\");\n"
-			end
-		end
-	end
-	result = result .. "}\n"
-	return result
-end
-
-if false then
-	local file = io.open("minetest.conf.example", "w")
-	if file then
-		file:write(create_minetest_conf_example())
-		file:close()
-	end
-end
-
-if false then
-	local file = io.open("src/settings_translation_file.cpp", "w")
-	if file then
-		file:write(create_translation_file())
-		file:close()
-	end
-end
+--assert(loadfile(core.get_mainmenu_path()..DIR_DELIM.."generate_from_settingtypes.lua"))(parse_config_file(true, false))
diff --git a/builtin/mainmenu/generate_from_settingtypes.lua b/builtin/mainmenu/generate_from_settingtypes.lua
new file mode 100644
index 000000000..6c9ba27fb
--- /dev/null
+++ b/builtin/mainmenu/generate_from_settingtypes.lua
@@ -0,0 +1,99 @@
+local settings = ...
+
+local concat = table.concat
+local insert = table.insert
+local sprintf = string.format
+local rep = string.rep
+
+local minetest_example_header = [[
+#    This file contains a list of all available settings and their default value for minetest.conf
+
+#    By default, all the settings are commented and not functional.
+#    Uncomment settings by removing the preceding #.
+
+#    minetest.conf is read by default from:
+#    ../minetest.conf
+#    ../../minetest.conf
+#    Any other path can be chosen by passing the path as a parameter
+#    to the program, eg. "minetest.exe --config ../minetest.conf.example".
+
+#    Further documentation:
+#    http://wiki.minetest.net/
+
+]]
+
+local function create_minetest_conf_example()
+	local result = { minetest_example_header }
+	for _, entry in ipairs(settings) do
+		if entry.type == "category" then
+			if entry.level == 0 then
+				insert(result, "#\n# " .. entry.name .. "\n#\n\n")
+			else
+				insert(result, rep("#", entry.level))
+				insert(result, "# " .. entry.name .. "\n\n")
+			end
+		else
+			if entry.comment ~= "" then
+				for _, comment_line in ipairs(entry.comment:split("\n", true)) do
+					insert(result, "#    " .. comment_line .. "\n")
+				end
+			end
+			insert(result, "#    type: " .. entry.type)
+			if entry.min then
+				insert(result, " min: " .. entry.min)
+			end
+			if entry.max then
+				insert(result, " max: " .. entry.max)
+			end
+			if entry.values then
+				insert(result, " values: " .. concat(entry.values, ", "))
+			end
+			if entry.possible then
+				insert(result, " possible values: " .. entry.possible:gsub(",", ", "))
+			end
+			insert(result, "\n")
+			local append
+			if entry.default ~= "" then
+				append = " " .. entry.default
+			end
+			insert(result, sprintf("# %s =%s\n\n", entry.name, append or ""))
+		end
+	end
+	return concat(result)
+end
+
+local translation_file_header = [[
+// This file is automatically generated
+// It conatins a bunch of fake gettext calls, to tell xgettext about the strings in config files
+// To update it, refer to the bottom of builtin/mainmenu/dlg_settings_advanced.lua
+
+fake_function() {]]
+
+local function create_translation_file()
+	local result = { translation_file_header }
+	for _, entry in ipairs(settings) do
+		if entry.type == "category" then
+			insert(result, sprintf("\tgettext(%q);", entry.name))
+		else
+			if entry.readable_name then
+				insert(result, sprintf("\tgettext(%q);", entry.readable_name))
+			end
+			if entry.comment ~= "" then
+				local comment_escaped = entry.comment:gsub("\n", "\\n")
+				comment_escaped = comment_escaped:gsub("\"", "\\\"")
+				insert(result, "\tgettext(\"" .. comment_escaped .. "\");")
+			end
+		end
+	end
+	insert(result, "}\n")
+	return concat(result, "\n")
+end
+
+local file = assert(io.open("minetest.conf.example", "w"))
+file:write(create_minetest_conf_example())
+file:close()
+
+file = assert(io.open("src/settings_translation_file.cpp", "w"))
+file:write(create_translation_file())
+file:close()
+
diff --git a/builtin/mainmenu/modmgr.lua b/builtin/mainmenu/modmgr.lua
index f996df7ba..2b7b371bf 100644
--- a/builtin/mainmenu/modmgr.lua
+++ b/builtin/mainmenu/modmgr.lua
@@ -284,27 +284,33 @@ end
 
 --------------------------------------------------------------------------------
 function modmgr.get_dependencies(modfolder)
-	local toadd = ""
+	local toadd_hard = ""
+	local toadd_soft = ""
 	if modfolder ~= nil then
 		local filename = modfolder ..
 					DIR_DELIM .. "depends.txt"
 
+		local hard_dependencies = {}
+		local soft_dependencies = {}
 		local dependencyfile = io.open(filename,"r")
-
 		if dependencyfile then
 			local dependency = dependencyfile:read("*l")
 			while dependency do
-				if toadd ~= "" then
-					toadd = toadd .. ","
+				dependency = dependency:gsub("\r", "")
+				if string.sub(dependency, -1, -1) == "?" then
+					table.insert(soft_dependencies, string.sub(dependency, 1, -2))
+				else
+					table.insert(hard_dependencies, dependency)
 				end
-				toadd = toadd .. dependency
 				dependency = dependencyfile:read()
 			end
 			dependencyfile:close()
 		end
+		toadd_hard = table.concat(hard_dependencies, ",")
+		toadd_soft = table.concat(soft_dependencies, ",")
 	end
 
-	return toadd
+	return toadd_hard, toadd_soft
 end
 
 --------------------------------------------------------------------------------
diff --git a/builtin/mainmenu/tab_credits.lua b/builtin/mainmenu/tab_credits.lua
index 4d2ffd7f4..c2ad19183 100644
--- a/builtin/mainmenu/tab_credits.lua
+++ b/builtin/mainmenu/tab_credits.lua
@@ -29,20 +29,23 @@ local core_developers = {
 	"Loic Blot (nerzhul/nrz) <loic.blot@unix-experience.fr>",
 	"Matt Gregory (paramat)",
 	"est31 <MTest31@outlook.com>",
-	"Craig Robbins (Zeno)",
+	"Craig Robbins (Zeno) <craig.d.robbins@gmail.com>",
+	"Auke Kok (sofar) <sofar@foo-projects.org>",
+	"Andrew Ward (rubenwardy) <rubenwardy@gmail.com>",
 }
 
 local active_contributors = {
-	"Auke Kok (sofar) <sofar@foo-projects.org>",
 	"Duane Robertson <duane@duanerobertson.com>",
 	"SmallJoker <mk939@ymail.com>",
-	"Andrew Ward (rubenwardy) <rubenwardy@gmail.com>",
+	"Lars Hofhansl <larsh@apache.org>",
 	"Jeija <jeija@mesecons.net>",
 	"Gregory Currie (gregorycu)",
 	"Sokomine <wegwerf@anarres.dyndns.org>",
 	"TeTpaAka",
 	"Jean-Patrick G (kilbith) <jeanpatrick.guerrero@gmail.com>",
 	"Diego Martínez (kaeza) <kaeza@users.sf.net>",
+	"Dániel Juhász (juhdanad) <juhdanad@gmail.com>",
+	"Rogier <rogier777@gmail.com>",
 }
 
 local previous_core_developers = {
@@ -76,17 +79,13 @@ return {
 	caption = fgettext("Credits"),
 	cbf_formspec = function(tabview, name, tabdata)
 		local logofile = defaulttexturedir .. "logo.png"
+		local version = core.get_version()
 		return "image[0.5,1;" .. core.formspec_escape(logofile) .. "]" ..
-			"label[0.5,3.2;Minetest " .. core.get_version() .. "]" ..
+			"label[0.5,3.2;" .. version.project .. " " .. version.string .. "]" ..
 			"label[0.5,3.5;http://minetest.net]" ..
 			"tablecolumns[color;text]" ..
 			"tableoptions[background=#00000000;highlight=#00000000;border=false]" ..
 			"table[3.5,-0.25;8.5,5.8;list_credits;" ..
-			"#FFFF00," .. "Dedication of the current release" .. ",," ..
-			"The 0.4.14 release is dedicated to the memory of" .. ",," ..
-			"Minetest developer Maciej Kasatkin (RealBadAngel)" .. ",," ..
-			"who died on March 24 2016." .. ",," ..
-			"Our thoughts are with his family and friends." .. ",,," ..
 			"#FFFF00," .. fgettext("Core Developers") .. ",," ..
 			table.concat(core_developers, ",,") .. ",,," ..
 			"#FFFF00," .. fgettext("Active Contributors") .. ",," ..
diff --git a/builtin/mainmenu/tab_mods.lua b/builtin/mainmenu/tab_mods.lua
index 5b59aa110..4a5b6c041 100644
--- a/builtin/mainmenu/tab_mods.lua
+++ b/builtin/mainmenu/tab_mods.lua
@@ -98,12 +98,24 @@ local function get_formspec(tabview, name, tabdata)
 				.. fgettext("Uninstall selected modpack") .. "]"
 		else
 			--show dependencies
-
-			retval = retval .. "," .. fgettext("Depends:") .. ","
-
-			local toadd = modmgr.get_dependencies(selected_mod.path)
-
-			retval = retval .. toadd .. ";0]"
+			local toadd_hard, toadd_soft = modmgr.get_dependencies(selected_mod.path)
+			if toadd_hard == "" and toadd_soft == "" then
+				retval = retval .. "," .. fgettext("No dependencies.")
+			else
+				if toadd_hard ~= "" then
+					retval = retval .. "," .. fgettext("Dependencies:") .. ","
+					retval = retval .. toadd_hard
+				end
+				if toadd_soft ~= "" then
+					if toadd_hard ~= "" then
+						retval = retval .. ","
+					end
+					retval = retval .. "," .. fgettext("Optional dependencies:") .. ","
+					retval = retval .. toadd_soft
+				end
+			end
+
+			retval = retval .. ";0]"
 
 			retval = retval .. "button[5.5,4.85;4.5,0.5;btn_mod_mgr_delete_mod;"
 				.. fgettext("Uninstall selected mod") .. "]"
diff --git a/builtin/mainmenu/tab_texturepacks.lua b/builtin/mainmenu/tab_texturepacks.lua
index a102fd61d..4638beaa1 100644
--- a/builtin/mainmenu/tab_texturepacks.lua
+++ b/builtin/mainmenu/tab_texturepacks.lua
@@ -73,7 +73,7 @@ local function get_formspec(tabview, name, tabdata)
 	if not file_exists(infofile) then
 		infofile = current_texture_path .. DIR_DELIM .. "info.txt"
 		if file_exists(infofile) then
-			core.log("info.txt is depreciated. description.txt should be used instead.")
+			core.log("deprecated", "info.txt is deprecated. description.txt should be used instead.")
 		end
 	end
 
@@ -96,8 +96,8 @@ local function get_formspec(tabview, name, tabdata)
 	return	retval ..
 			render_texture_pack_list(list) ..
 			";" .. index .. "]" ..
-			"image[0.25,0.25;4.0,3.7;" .. core.formspec_escape(screenfile or no_screenshot) .. "]" ..
-			"textarea[0.6,3.5;3.7,1.5;;" .. core.formspec_escape(infotext or "") .. ";]"
+			"image[0.25,0.25;4.05,2.7;" .. core.formspec_escape(screenfile or no_screenshot) .. "]" ..
+			"textarea[0.6,2.85;3.7,1.5;;" .. core.formspec_escape(infotext or "") .. ";]"
 end
 
 --------------------------------------------------------------------------------
diff --git a/builtin/profiler/init.lua b/builtin/profiler/init.lua
new file mode 100644
index 000000000..c1597d280
--- /dev/null
+++ b/builtin/profiler/init.lua
@@ -0,0 +1,72 @@
+--Minetest
+--Copyright (C) 2016 T4im
+--
+--This program is free software; you can redistribute it and/or modify
+--it under the terms of the GNU Lesser General Public License as published by
+--the Free Software Foundation; either version 2.1 of the License, or
+--(at your option) any later version.
+--
+--This program is distributed in the hope that it will be useful,
+--but WITHOUT ANY WARRANTY; without even the implied warranty of
+--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+--GNU Lesser General Public License for more details.
+--
+--You should have received a copy of the GNU Lesser General Public License along
+--with this program; if not, write to the Free Software Foundation, Inc.,
+--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+local profiler_path = core.get_builtin_path()..DIR_DELIM.."profiler"..DIR_DELIM
+local profiler = {}
+local sampler = assert(loadfile(profiler_path .. "sampling.lua"))(profiler)
+local instrumentation  = assert(loadfile(profiler_path .. "instrumentation.lua"))(profiler, sampler)
+local reporter = dofile(profiler_path .. "reporter.lua")
+profiler.instrument = instrumentation.instrument
+
+---
+-- Delayed registration of the /profiler chat command
+-- Is called later, after `core.register_chatcommand` was set up.
+--
+function profiler.init_chatcommand()
+	local instrument_profiler = core.setting_getbool("instrument.profiler") or false
+	if instrument_profiler then
+		instrumentation.init_chatcommand()
+	end
+
+	local param_usage = "print [filter] | dump [filter] | save [format [filter]] | reset"
+	core.register_chatcommand("profiler", {
+		description = "handle the profiler and profiling data",
+		params = param_usage,
+		privs = { server=true },
+		func = function(name, param)
+			local command, arg0 = string.match(param, "([^ ]+) ?(.*)")
+			local args = arg0 and string.split(arg0, " ")
+
+			if command == "dump" then
+				core.log("action", reporter.print(sampler.profile, arg0))
+				return true, "Statistics written to action log"
+			elseif command == "print" then
+				return true, reporter.print(sampler.profile, arg0)
+			elseif command == "save" then
+				return reporter.save(sampler.profile, args[1] or "txt", args[2])
+			elseif command == "reset" then
+				sampler.reset()
+				return true, "Statistics were reset"
+			end
+
+			return false, string.format(
+				"Usage: %s\n" ..
+				"Format can be one of txt, csv, lua, json, json_pretty (structures may be subject to change).",
+				param_usage
+			)
+		end
+	})
+
+	if not instrument_profiler then
+		instrumentation.init_chatcommand()
+	end
+end
+
+sampler.init()
+instrumentation.init()
+
+return profiler
diff --git a/builtin/profiler/instrumentation.lua b/builtin/profiler/instrumentation.lua
new file mode 100644
index 000000000..4311215b2
--- /dev/null
+++ b/builtin/profiler/instrumentation.lua
@@ -0,0 +1,232 @@
+--Minetest
+--Copyright (C) 2016 T4im
+--
+--This program is free software; you can redistribute it and/or modify
+--it under the terms of the GNU Lesser General Public License as published by
+--the Free Software Foundation; either version 2.1 of the License, or
+--(at your option) any later version.
+--
+--This program is distributed in the hope that it will be useful,
+--but WITHOUT ANY WARRANTY; without even the implied warranty of
+--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+--GNU Lesser General Public License for more details.
+--
+--You should have received a copy of the GNU Lesser General Public License along
+--with this program; if not, write to the Free Software Foundation, Inc.,
+--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+local format, pairs, type = string.format, pairs, type
+local core, get_current_modname = core, core.get_current_modname
+local profiler, sampler = ...
+local instrument_builtin = core.setting_getbool("instrument.builtin") or false
+
+local register_functions = {
+	register_globalstep = 0,
+	register_playerevent = 0,
+	register_on_placenode = 0,
+	register_on_dignode = 0,
+	register_on_punchnode = 0,
+	register_on_generated = 0,
+	register_on_newplayer = 0,
+	register_on_dieplayer = 0,
+	register_on_respawnplayer = 0,
+	register_on_prejoinplayer = 0,
+	register_on_joinplayer = 0,
+	register_on_leaveplayer = 0,
+	register_on_cheat = 0,
+	register_on_chat_message = 0,
+	register_on_player_receive_fields = 0,
+	register_on_craft = 0,
+	register_craft_predict = 0,
+	register_on_protection_violation = 0,
+	register_on_item_eat = 0,
+	register_on_punchplayer = 0,
+	register_on_player_hpchange = 0,
+}
+
+---
+-- Create an unique instrument name.
+-- Generate a missing label with a running index number.
+--
+local counts = {}
+local function generate_name(def)
+	local class, label, func_name = def.class, def.label, def.func_name
+	if label then
+		if class or func_name then
+			return format("%s '%s' %s", class or "", label, func_name or ""):trim()
+		end
+		return format("%s", label):trim()
+	elseif label == false then
+		return format("%s", class or func_name):trim()
+	end
+
+	local index_id = def.mod .. (class or func_name)
+	local index = counts[index_id] or 1
+	counts[index_id] = index + 1
+	return format("%s[%d] %s", class or func_name, index, class and func_name or ""):trim()
+end
+
+---
+-- Keep `measure` and the closure in `instrument` lean, as these, and their
+-- directly called functions are the overhead that is caused by instrumentation.
+--
+local time, log = core.get_us_time, sampler.log
+local function measure(modname, instrument_name, start, ...)
+	log(modname, instrument_name, time() - start)
+	return ...
+end
+--- Automatically instrument a function to measure and log to the sampler.
+-- def = {
+-- 		mod = "",
+-- 		class = "",
+-- 		func_name = "",
+-- 		-- if nil, will create a label based on registration order
+-- 		label = "" | false,
+-- }
+local function instrument(def)
+	if not def or not def.func then
+		return
+	end
+	def.mod = def.mod or get_current_modname()
+	local modname = def.mod
+	local instrument_name = generate_name(def)
+	local func = def.func
+
+	if not instrument_builtin and modname == "*builtin*" then
+		return func
+	end
+
+	return function(...)
+		-- This tail-call allows passing all return values of `func`
+		-- also called https://en.wikipedia.org/wiki/Continuation_passing_style
+		-- Compared to table creation and unpacking it won't lose `nil` returns
+		-- and is expected to be faster
+		-- `measure` will be executed after time() and func(...)
+		return measure(modname, instrument_name, time(), func(...))
+	end
+end
+
+local function can_be_called(func)
+	-- It has to be a function or callable table
+	return type(func) == "function" or
+		((type(func) == "table" or type(func) == "userdata") and
+		getmetatable(func) and getmetatable(func).__call)
+end
+
+local function assert_can_be_called(func, func_name, level)
+	if not can_be_called(func) then
+		-- Then throw an *helpful* error, by pointing on our caller instead of us.
+		error(format("Invalid argument to %s. Expected function-like type instead of '%s'.", func_name, type(func)), level + 1)
+	end
+end
+
+---
+-- Wraps a registration function `func` in such a way,
+-- that it will automatically instrument any callback function passed as first argument.
+--
+local function instrument_register(func, func_name)
+	local register_name = func_name:gsub("^register_", "", 1)
+	return function(callback, ...)
+		assert_can_be_called(callback, func_name, 2)
+		register_functions[func_name] = register_functions[func_name] + 1
+		return func(instrument {
+			func = callback,
+			func_name = register_name
+		}), ...
+	end
+end
+
+local function init_chatcommand()
+	if core.setting_getbool("instrument.chatcommand") or true then
+		local orig_register_chatcommand = core.register_chatcommand
+		core.register_chatcommand = function(cmd, def)
+			def.func = instrument {
+				func = def.func,
+				label = "/" .. cmd,
+			}
+			orig_register_chatcommand(cmd, def)
+		end
+	end
+end
+
+---
+-- Start instrumenting selected functions
+--
+local function init()
+	local is_set = core.setting_getbool
+	if is_set("instrument.entity") or true then
+		-- Explicitly declare entity api-methods.
+		-- Simple iteration would ignore lookup via __index.
+		local entity_instrumentation = {
+			"on_activate",
+			"on_step",
+			"on_punch",
+			"rightclick",
+			"get_staticdata",
+		}
+		-- Wrap register_entity() to instrument them on registration.
+		local orig_register_entity = core.register_entity
+		core.register_entity = function(name, prototype)
+			local modname = get_current_modname()
+			for _, func_name in pairs(entity_instrumentation) do
+				prototype[func_name] = instrument {
+					func = prototype[func_name],
+					mod = modname,
+					func_name = func_name,
+					label = prototype.label,
+				}
+			end
+			orig_register_entity(name,prototype)
+		end
+	end
+
+	if is_set("instrument.abm") or true then
+		-- Wrap register_abm() to automatically instrument abms.
+		local orig_register_abm = core.register_abm
+		core.register_abm = function(spec)
+			spec.action = instrument {
+				func = spec.action,
+				class = "ABM",
+				label = spec.label,
+			}
+			orig_register_abm(spec)
+		end
+	end
+
+	if is_set("instrument.lbm") or true then
+		-- Wrap register_lbm() to automatically instrument lbms.
+		local orig_register_lbm = core.register_lbm
+		core.register_lbm = function(spec)
+			spec.action = instrument {
+				func = spec.action,
+				class = "LBM",
+				label = spec.label or spec.name,
+			}
+			orig_register_lbm(spec)
+		end
+	end
+
+	if is_set("instrument.global_callback") or true then
+		for func_name, _ in pairs(register_functions) do
+			core[func_name] = instrument_register(core[func_name], func_name)
+		end
+	end
+
+	if is_set("instrument.profiler") or false then
+		-- Measure overhead of instrumentation, but keep it down for functions
+		-- So keep the `return` for better optimization.
+		profiler.empty_instrument = instrument {
+			func = function() return end,
+			mod = "*profiler*",
+			class = "Instrumentation overhead",
+			label = false,
+		}
+	end
+end
+
+return {
+	register_functions = register_functions,
+	instrument = instrument,
+	init = init,
+	init_chatcommand = init_chatcommand,
+}
diff --git a/builtin/profiler/reporter.lua b/builtin/profiler/reporter.lua
new file mode 100644
index 000000000..5b38ed4df
--- /dev/null
+++ b/builtin/profiler/reporter.lua
@@ -0,0 +1,277 @@
+--Minetest
+--Copyright (C) 2016 T4im
+--
+--This program is free software; you can redistribute it and/or modify
+--it under the terms of the GNU Lesser General Public License as published by
+--the Free Software Foundation; either version 2.1 of the License, or
+--(at your option) any later version.
+--
+--This program is distributed in the hope that it will be useful,
+--but WITHOUT ANY WARRANTY; without even the implied warranty of
+--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+--GNU Lesser General Public License for more details.
+--
+--You should have received a copy of the GNU Lesser General Public License along
+--with this program; if not, write to the Free Software Foundation, Inc.,
+--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+local DIR_DELIM, LINE_DELIM = DIR_DELIM, "\n"
+local table, unpack, string, pairs, io, os = table, unpack, string, pairs, io, os
+local rep, sprintf, tonumber = string.rep, string.format, tonumber
+local core, setting_get = core, core.setting_get
+local reporter = {}
+
+---
+-- Shorten a string. End on an ellipsis if shortened.
+--
+local function shorten(str, length)
+	if str and str:len() > length then
+		return "..." .. str:sub(-(length-3))
+	end
+	return str
+end
+
+local function filter_matches(filter, text)
+	return not filter or string.match(text, filter)
+end
+
+local function format_number(number, fmt)
+	number = tonumber(number)
+	if not number then
+		return "N/A"
+	end
+	return sprintf(fmt or "%d", number)
+end
+
+local Formatter = {
+	new = function(self, object)
+		object = object or {}
+		object.out = {} -- output buffer
+		self.__index = self
+		return setmetatable(object, self)
+	end,
+	__tostring = function (self)
+		return table.concat(self.out, LINE_DELIM)
+	end,
+	print = function(self, text, ...)
+		if (...) then
+			text = sprintf(text, ...)
+		end
+
+		if text then
+			-- Avoid format unicode issues.
+			text = text:gsub("Ms", "µs")
+		end
+
+		table.insert(self.out, text or LINE_DELIM)
+	end,
+	flush = function(self)
+		table.insert(self.out, LINE_DELIM)
+		local text = table.concat(self.out, LINE_DELIM)
+		self.out = {}
+		return text
+	end
+}
+
+local widths = { 55, 9, 9, 9, 5, 5, 5 }
+local txt_row_format = sprintf(" %%-%ds | %%%ds | %%%ds | %%%ds | %%%ds | %%%ds | %%%ds", unpack(widths))
+
+local HR = {}
+for i=1, #widths do
+	HR[i]= rep("-", widths[i])
+end
+-- ' | ' should break less with github than '-+-', when people are pasting there
+HR = sprintf("-%s-", table.concat(HR, " | "))
+
+local TxtFormatter = Formatter:new {
+	format_row = function(self, modname, instrument_name, statistics)
+		local label
+		if instrument_name then
+			label = shorten(instrument_name, widths[1] - 5)
+			label = sprintf(" - %s %s", label, rep(".", widths[1] - 5 - label:len()))
+		else -- Print mod_stats
+			label = shorten(modname, widths[1] - 2) .. ":"
+		end
+
+		self:print(txt_row_format, label,
+			format_number(statistics.time_min),
+			format_number(statistics.time_max),
+			format_number(statistics:get_time_avg()),
+			format_number(statistics.part_min, "%.1f"),
+			format_number(statistics.part_max, "%.1f"),
+			format_number(statistics:get_part_avg(), "%.1f")
+		)
+	end,
+	format = function(self, filter)
+		local profile = self.profile
+		self:print("Values below show absolute/relative times spend per server step by the instrumented function.")
+		self:print("A total of %d samples were taken", profile.stats_total.samples)
+
+		if filter then
+			self:print("The output is limited to '%s'", filter)
+		end
+
+		self:print()
+		self:print(
+			txt_row_format,
+			"instrumentation", "min Ms", "max Ms", "avg Ms", "min %", "max %", "avg %"
+		)
+		self:print(HR)
+		for modname,mod_stats in pairs(profile.stats) do
+			if filter_matches(filter, modname) then
+				self:format_row(modname, nil, mod_stats)
+
+				if mod_stats.instruments ~= nil then
+					for instrument_name, instrument_stats in pairs(mod_stats.instruments) do
+						self:format_row(nil, instrument_name, instrument_stats)
+					end
+				end
+			end
+		end
+		self:print(HR)
+		if not filter then
+			self:format_row("total", nil, profile.stats_total)
+		end
+	end
+}
+
+local CsvFormatter = Formatter:new {
+	format_row = function(self, modname, instrument_name, statistics)
+		self:print(
+			"%q,%q,%d,%d,%d,%d,%d,%f,%f,%f",
+			modname, instrument_name,
+			statistics.samples,
+			statistics.time_min,
+			statistics.time_max,
+			statistics:get_time_avg(),
+			statistics.time_all,
+			statistics.part_min,
+			statistics.part_max,
+			statistics:get_part_avg()
+		)
+	end,
+	format = function(self, filter)
+		self:print(
+			"%q,%q,%q,%q,%q,%q,%q,%q,%q,%q",
+			"modname", "instrumentation",
+			"samples",
+			"time min µs",
+			"time max µs",
+			"time avg µs",
+			"time all µs",
+			"part min %",
+			"part max %",
+			"part avg %"
+		)
+		for modname, mod_stats in pairs(self.profile.stats) do
+			if filter_matches(filter, modname) then
+				self:format_row(modname, "*", mod_stats)
+
+				if mod_stats.instruments ~= nil then
+					for instrument_name, instrument_stats in pairs(mod_stats.instruments) do
+						self:format_row(modname, instrument_name, instrument_stats)
+					end
+				end
+			end
+		end
+	end
+}
+
+local function format_statistics(profile, format, filter)
+	local formatter
+	if format == "csv" then
+		formatter = CsvFormatter:new {
+			profile = profile
+		}
+	else
+		formatter = TxtFormatter:new {
+			profile = profile
+		}
+	end
+	formatter:format(filter)
+	return formatter:flush()
+end
+
+---
+-- Format the profile ready for display and
+-- @return string to be printed to the console
+--
+function reporter.print(profile, filter)
+	if filter == "" then filter = nil end
+	return format_statistics(profile, "txt", filter)
+end
+
+---
+-- Serialize the profile data and
+-- @return serialized data to be saved to a file
+--
+local function serialize_profile(profile, format, filter)
+	if format == "lua" or format == "json" or format == "json_pretty" then
+		local stats = filter and {} or profile.stats
+		if filter then
+			for modname, mod_stats in pairs(profile.stats) do
+				if filter_matches(filter, modname) then
+					stats[modname] = mod_stats
+				end
+			end
+		end
+		if format == "lua" then
+			return core.serialize(stats)
+		elseif format == "json" then
+			return core.write_json(stats)
+		elseif format == "json_pretty" then
+			return core.write_json(stats, true)
+		end
+	end
+	-- Fall back to textual formats.
+	return format_statistics(profile, format, filter)
+end
+
+local worldpath = core.get_worldpath()
+local function get_save_path(format, filter)
+	local report_path = setting_get("profiler.report_path") or ""
+	if report_path ~= "" then
+		core.mkdir(sprintf("%s%s%s", worldpath, DIR_DELIM, report_path))
+	end
+	return (sprintf(
+		"%s/%s/profile-%s%s.%s",
+		worldpath,
+		report_path,
+		os.date("%Y%m%dT%H%M%S"),
+		filter and ("-" .. filter) or "",
+		format
+	):gsub("[/\\]+", DIR_DELIM))-- Clean up delims
+end
+
+---
+-- Save the profile to the world path.
+-- @return success, log message
+--
+function reporter.save(profile, format, filter)
+	if not format or format == "" then
+		format = setting_get("profiler.default_report_format") or "txt"
+	end
+	if filter == "" then
+		filter = nil
+	end
+
+	local path = get_save_path(format, filter)
+
+	local output, io_err = io.open(path, "w")
+	if not output then
+		return false, "Saving of profile failed with: " .. io_err
+	end
+	local content, err = serialize_profile(profile, format, filter)
+	if not content then
+		output:close()
+		return false, "Saving of profile failed with: " .. err
+	end
+	output:write(content)
+	output:close()
+
+	local logmessage = "Profile saved to " .. path
+	core.log("action", logmessage)
+	return true, logmessage
+end
+
+return reporter
diff --git a/builtin/profiler/sampling.lua b/builtin/profiler/sampling.lua
new file mode 100644
index 000000000..1d1ef256d
--- /dev/null
+++ b/builtin/profiler/sampling.lua
@@ -0,0 +1,206 @@
+--Minetest
+--Copyright (C) 2016 T4im
+--
+--This program is free software; you can redistribute it and/or modify
+--it under the terms of the GNU Lesser General Public License as published by
+--the Free Software Foundation; either version 2.1 of the License, or
+--(at your option) any later version.
+--
+--This program is distributed in the hope that it will be useful,
+--but WITHOUT ANY WARRANTY; without even the implied warranty of
+--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+--GNU Lesser General Public License for more details.
+--
+--You should have received a copy of the GNU Lesser General Public License along
+--with this program; if not, write to the Free Software Foundation, Inc.,
+--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+local setmetatable = setmetatable
+local pairs, format = pairs, string.format
+local min, max, huge = math.min, math.max, math.huge
+local core = core
+
+local profiler = ...
+-- Split sampler and profile up, to possibly allow for rotation later.
+local sampler = {}
+local profile
+local stats_total
+local logged_time, logged_data
+
+local _stat_mt = {
+	get_time_avg = function(self)
+		return self.time_all/self.samples
+	end,
+	get_part_avg = function(self)
+		if not self.part_all then
+			return 100 -- Extra handling for "total"
+		end
+		return self.part_all/self.samples
+	end,
+}
+_stat_mt.__index = _stat_mt
+
+function sampler.reset()
+	-- Accumulated logged time since last sample.
+	-- This helps determining, the relative time a mod used up.
+	logged_time = 0
+	-- The measurements taken through instrumentation since last sample.
+	logged_data = {}
+
+	profile = {
+		-- Current mod statistics (max/min over the entire mod lifespan)
+		-- Mod specific instrumentation statistics are nested within.
+		stats = {},
+		-- Current stats over all mods.
+		stats_total = setmetatable({
+			samples = 0,
+			time_min = huge,
+			time_max = 0,
+			time_all = 0,
+			part_min = 100,
+			part_max = 100
+		}, _stat_mt)
+	}
+	stats_total = profile.stats_total
+
+	-- Provide access to the most recent profile.
+	sampler.profile = profile
+end
+
+---
+-- Log a measurement for the sampler to pick up later.
+-- Keep `log` and its often called functions lean.
+-- It will directly add to the instrumentation overhead.
+--
+function sampler.log(modname, instrument_name, time_diff)
+	if time_diff <= 0 then
+		if time_diff < 0 then
+			-- This **might** have happened on a semi-regular basis with huge mods,
+			-- resulting in negative statistics (perhaps midnight time jumps or ntp corrections?).
+			core.log("warning", format(
+					"Time travel of %s::%s by %dµs.",
+					modname, instrument_name, time_diff
+			))
+		end
+		-- Throwing these away is better, than having them mess with the overall result.
+		return
+	end
+
+	local mod_data = logged_data[modname]
+	if mod_data == nil then
+		mod_data = {}
+		logged_data[modname] = mod_data
+	end
+
+	mod_data[instrument_name] = (mod_data[instrument_name] or 0) + time_diff
+	-- Update logged time since last sample.
+	logged_time = logged_time + time_diff
+end
+
+---
+-- Return a requested statistic.
+-- Initialize if necessary.
+--
+local function get_statistic(stats_table, name)
+	local statistic = stats_table[name]
+	if statistic == nil then
+		statistic = setmetatable({
+			samples = 0,
+			time_min = huge,
+			time_max = 0,
+			time_all = 0,
+			part_min = 100,
+			part_max = 0,
+			part_all = 0,
+		}, _stat_mt)
+		stats_table[name] = statistic
+	end
+	return statistic
+end
+
+---
+-- Update a statistic table
+--
+local function update_statistic(stats_table, time)
+	stats_table.samples = stats_table.samples + 1
+
+	-- Update absolute time (µs) spend by the subject
+	stats_table.time_min = min(stats_table.time_min, time)
+	stats_table.time_max = max(stats_table.time_max, time)
+	stats_table.time_all = stats_table.time_all + time
+
+	-- Update relative time (%) of this sample spend by the subject
+	local current_part = (time/logged_time) * 100
+	stats_table.part_min = min(stats_table.part_min, current_part)
+	stats_table.part_max = max(stats_table.part_max, current_part)
+	stats_table.part_all = stats_table.part_all + current_part
+end
+
+---
+-- Sample all logged measurements each server step.
+-- Like any globalstep function, this should not be too heavy,
+-- but does not add to the instrumentation overhead.
+--
+local function sample(dtime)
+	-- Rare, but happens and is currently of no informational value.
+	if logged_time == 0 then
+		return
+	end
+
+	for modname, instruments in pairs(logged_data) do
+		local mod_stats = get_statistic(profile.stats, modname)
+		if mod_stats.instruments == nil then
+			-- Current statistics for each instrumentation component
+			mod_stats.instruments = {}
+		end
+
+		local mod_time = 0
+		for instrument_name, time in pairs(instruments) do
+			if time > 0 then
+				mod_time = mod_time + time
+				local instrument_stats = get_statistic(mod_stats.instruments, instrument_name)
+
+				-- Update time of this sample spend by the instrumented function.
+				update_statistic(instrument_stats, time)
+				-- Reset logged data for the next sample.
+				instruments[instrument_name] = 0
+			end
+		end
+
+		-- Update time of this sample spend by this mod.
+		update_statistic(mod_stats, mod_time)
+	end
+
+	-- Update the total time spend over all mods.
+	stats_total.time_min = min(stats_total.time_min, logged_time)
+	stats_total.time_max = max(stats_total.time_max, logged_time)
+	stats_total.time_all = stats_total.time_all + logged_time
+
+	stats_total.samples = stats_total.samples + 1
+	logged_time = 0
+end
+
+---
+-- Setup empty profile and register the sampling function
+--
+function sampler.init()
+	sampler.reset()
+
+	if core.setting_getbool("instrument.profiler") then
+		core.register_globalstep(function()
+			if logged_time == 0 then
+				return
+			end
+			return profiler.empty_instrument()
+		end)
+		core.register_globalstep(profiler.instrument {
+			func = sample,
+			mod = "*profiler*",
+			class = "Sampler (update stats)",
+			label = false,
+		})
+	else
+		core.register_globalstep(sample)
+	end
+end
+
+return sampler
diff --git a/builtin/settingtypes.txt b/builtin/settingtypes.txt
index ad269d8b0..1818b5a18 100644
--- a/builtin/settingtypes.txt
+++ b/builtin/settingtypes.txt
@@ -3,7 +3,7 @@
 # General format:
 #    name (Readable name) type type_args
 #
-# Note that the parts are seperated by exactly one space
+# Note that the parts are separated by exactly one space
 #
 # `type` can be:
 #    - int
@@ -70,7 +70,7 @@ fast_move (Fast movement) bool false
 #    This requires the "noclip" privilege on the server.
 noclip (Noclip) bool false
 
-#    Smooths camera when moving and looking around.
+#    Smooths camera when looking around. Also called look or mouse smoothing.
 #    Useful for recording videos.
 cinematic (Cinematic mode) bool false
 
@@ -104,6 +104,17 @@ random_input (Random input) bool false
 #    Continuous forward movement (only used for testing).
 continuous_forward (Continuous forward) bool false
 
+#    Enable Joysticks
+enable_joysticks (Enable Joysticks) bool false
+
+#    The time in seconds it takes between repeated events
+#    when holding down a joystick button combination.
+repeat_joystick_button_time (Joystick button repetition interval) float 0.17
+
+#    The sensitivity of the joystick axes for moving the
+#    ingame view frustum around.
+joystick_frustum_sensitivity (Joystick frustum sensitivity) float 170
+
 #    Key for moving the player forward.
 #    See http://irrlicht.sourceforge.net/docu/namespaceirr.html#a54da2a0e231901735e3da1b0edf72eb3
 keymap_forward (Forward key) key KEY_KEY_W
@@ -165,9 +176,13 @@ keymap_fastmove (Fast key) key KEY_KEY_J
 #    See http://irrlicht.sourceforge.net/docu/namespaceirr.html#a54da2a0e231901735e3da1b0edf72eb3
 keymap_noclip (Noclip key) key KEY_KEY_H
 
+#    Key for toggling autorun.
+#    See http://irrlicht.sourceforge.net/docu/namespaceirr.html#a54da2a0e231901735e3da1b0edf72eb3
+keymap_autorun (Autorun key) key
+
 #    Key for toggling cinematic mode.
 #    See http://irrlicht.sourceforge.net/docu/namespaceirr.html#a54da2a0e231901735e3da1b0edf72eb3
-keymap_cinematic (Cinematic mode key) key KEY_F8
+keymap_cinematic (Cinematic mode key) key
 
 #    Key for toggling display of minimap.
 #    See http://irrlicht.sourceforge.net/docu/namespaceirr.html#a54da2a0e231901735e3da1b0edf72eb3
@@ -193,7 +208,7 @@ keymap_toggle_chat (Chat toggle key) key KEY_F2
 #    See http://irrlicht.sourceforge.net/docu/namespaceirr.html#a54da2a0e231901735e3da1b0edf72eb3
 keymap_toggle_force_fog_off (Fog toggle key) key KEY_F3
 
-#    Key for toggling the camrea update. Only used for development
+#    Key for toggling the camera update. Only used for development
 #    See http://irrlicht.sourceforge.net/docu/namespaceirr.html#a54da2a0e231901735e3da1b0edf72eb3
 keymap_toggle_update_camera (Camera update toggle key) key
 
@@ -236,7 +251,7 @@ remote_port (Remote port) int 30000 1 65535
 #    Enable if you want to connect to 0.4.12 servers and before.
 #    Servers starting with 0.4.13 will work, 0.4.12-dev servers may work.
 #    Disabling this option will protect your password better.
-send_pre_v25_init (Support older servers) bool true
+send_pre_v25_init (Support older servers) bool false
 
 #    Save the map received by the client on disk.
 enable_local_map_saving (Saving map received from server) bool false
@@ -324,7 +339,7 @@ fsaa (FSAA) enum 0 0,1,2,4,8,16
 
 [***Shaders]
 
-#    Shaders allow advanced visul effects and may increase performance on some video cards.
+#    Shaders allow advanced visual effects and may increase performance on some video cards.
 #    Thy only work with the OpenGL video backend.
 enable_shaders (Shaders) bool true
 
@@ -403,8 +418,7 @@ fps_max (Maximum FPS) int 60
 pause_fps_max (FPS in pause menu) int 20
 
 #    View distance in nodes.
-#    Min = 20
-viewing_range (Viewing range) int 100
+viewing_range (Viewing range) int 100 20 4000
 
 #    Width component of the initial window size.
 screenW (Screen width) int 800
@@ -424,6 +438,10 @@ vsync (V-Sync) bool false
 #    Field of view in degrees.
 fov (Field of view) int 72 30 160
 
+#    Field of view while zooming in degrees.
+#    This requires the "zoom" privilege on the server.
+zoom_fov (Field of view for zoom) int 15 15 160
+
 #    Adjust the gamma encoding for the light tables. Lower numbers are brighter.
 #    This setting is for the client only and is ignored by the server.
 display_gamma (Gamma) float 1.8 1.0 3.0
@@ -510,6 +528,9 @@ ambient_occlusion_gamma (Ambient occlusion gamma) float 2.2 0.25 4.0
 #    Enables animation of inventory items.
 inventory_items_animations (Inventory items animations) bool false
 
+#    Fraction of the visible distance at which fog starts to be rendered
+fog_start (Fog Start) float 0.4 0.0 0.99
+
 [**Menus]
 
 #    Use a cloud animation for the main menu background.
@@ -530,7 +551,7 @@ gui_scaling_filter (GUI scaling filter) bool false
 #    When gui_scaling_filter_txr2img is true, copy those images
 #    from hardware to software for scaling.  When false, fall back
 #    to the old scaling method, for video drivers that don't
-#    propery support downloading textures back from hardware.
+#    properly support downloading textures back from hardware.
 gui_scaling_filter_txr2img (GUI scaling filter txr2img) bool true
 
 #    Delay showing tooltips, stated in milliseconds.
@@ -542,13 +563,13 @@ freetype (Freetype fonts) bool true
 #    Path to TrueTypeFont or bitmap.
 font_path (Font path) path fonts/liberationsans.ttf
 
-font_size (Font size) int 15
+font_size (Font size) int 16
 
 #    Font shadow offset, if 0 then shadow will not be drawn.
 font_shadow (Font shadow) int 1
 
 #    Font shadow alpha (opaqueness, between 0 and 255).
-font_shadow_alpha (Font shadow alpha) int 128 0 255
+font_shadow_alpha (Font shadow alpha) int 127 0 255
 
 mono_font_path (Monospace font path) path fonts/liberationmono.ttf
 
@@ -615,6 +636,11 @@ server_announce (Announce server) bool false
 #    If you want to announce your ipv6 address, use  serverlist_url = v6.servers.minetest.net.
 serverlist_url (Serverlist URL) string servers.minetest.net
 
+#    Disable escape sequences, e.g. chat coloring.
+#    Use this if you want to run a server with pre-0.4.14 clients and you want to disable
+#    the escape sequences generated by mods.
+disable_escape_sequences (Disable escape sequences) bool false
+
 [*Network]
 
 #    Network port to listen (UDP).
@@ -642,15 +668,15 @@ ipv6_server (IPv6 server) bool false
 
 [**Advanced]
 
-#    How many blocks are flying in the wire simultaneously per client.
-max_simultaneous_block_sends_per_client (Maximum simultaneously blocks send per client) int 10
+#    Maximum number of blocks that are simultaneously sent per client.
+max_simultaneous_block_sends_per_client (Maximum simultaneous block sends per client) int 10
 
-#    How many blocks are flying in the wire simultaneously for the whole server.
-max_simultaneous_block_sends_server_total (Maximum simultaneously bocks send total) int 40
+#   Maximum number of blocks that are simultaneously sent in total.
+max_simultaneous_block_sends_server_total (Maximum simultaneous block sends total) int 40
 
 #    To reduce lag, block transfers are slowed down when a player is building something.
 #    This determines how long they are slowed down after placing or removing a node.
-full_block_send_enable_min_time_from_building () float 2.0
+full_block_send_enable_min_time_from_building (Delay in sending blocks after building) float 2.0
 
 #    Maximum number of packets sent per send step, if you have a slow connection
 #    try reducing it, but don't reduce it to a number below double of targeted
@@ -750,6 +776,15 @@ time_speed (Time speed) int 72
 #    Interval of saving important changes in the world, stated in seconds.
 server_map_save_interval (Map save interval) float 5.3
 
+#    Set the maximum character length of a chat message sent by clients.
+# chat_message_max_size int 500
+
+#    Limit a single player to send X messages per 10 seconds.
+# chat_message_limit_per_10sec float 10.0
+
+#    Kick player if send more than X messages per 10 seconds.
+# chat_message_limit_trigger_kick int 50
+
 [**Physics]
 
 movement_acceleration_default (Default acceleration) float 3
@@ -774,15 +809,6 @@ movement_gravity (Gravity) float 9.81
 #    -    error: abort on usage of deprecated call (suggested for mod developers).
 deprecated_lua_api_handling (Deprecated Lua API handling) enum legacy legacy,log,error
 
-#    Useful for mod developers.
-mod_profiling (Mod profiling) bool false
-
-#    Detailed mod profile data. Useful for mod developers.
-detailed_profiling (Detailed mod profiling) bool false
-
-#    Profiler data print interval. 0 = disable. Useful for developers.
-profiler_print_interval (Profiling print interval) int 0
-
 #    Number of extra blocks that can be loaded by /clearobjects at once.
 #    This is a trade-off between sqlite transaction overhead and
 #    memory consumption (4096=100MB, as a rule of thumb).
@@ -793,7 +819,7 @@ max_clearobjects_extra_loaded_blocks (Max. clearobjects extra blocks) int 4096
 server_unload_unused_data_timeout (Unload unused server data) int 29
 
 #    Maximum number of statically stored objects in a block.
-max_objects_per_block (Maxmimum objects per block) int 49
+max_objects_per_block (Maximum objects per block) int 64
 
 #    See http://www.sqlite.org/pragma.html#pragma_synchronous
 sqlite_synchronous (Synchronous SQLite) enum 2 0,1,2
@@ -825,11 +851,18 @@ liquid_queue_purge_time (Liquid queue purge time) int 0
 #    Liquid update interval in seconds.
 liquid_update (Liquid update tick) float 1.0
 
+#    At this distance the server will aggressively optimize which blocks are sent to clients.
+#    Small values potentially improve performance a lot, at the expense of visible rendering glitches.
+#    (some blocks will not be rendered under water and in caves, as well as sometimes on land)
+#    Setting this to a value greater than max_block_send_distance disables this optimization.
+#    Stated in mapblocks (16 nodes)
+block_send_optimize_distance (block send optimize distance) int 4 2
+
 [*Mapgen]
 
 #    Name of map generator to be used when creating a new world.
 #    Creating a world in the main menu will override this.
-mg_name (Mapgen name) enum v6 v5,v6,v7,flat,valleys,fractal,singlenode
+mg_name (Mapgen name) enum v7 v5,v6,v7,flat,valleys,fractal,singlenode
 
 #    Water surface level of the world.
 water_level (Water level) int 1
@@ -848,8 +881,6 @@ map_generation_limit (Map generation limit) int 31000 0 31000
 #    Global map generation attributes.
 #    In Mapgen v6 the 'decorations' flag controls all decorations except trees
 #    and junglegrass, in all other mapgens this flag controls all decorations.
-#    The default flags set in the engine are: caves, light, decorations
-#    The flags string modifies the engine defaults.
 #    Flags that are not specified in the flag string are not modified from the default.
 #    Flags starting with 'no' are used to explicitly disable them.
 mg_flags (Mapgen flags) flags caves,dungeons,light,decorations caves,dungeons,light,decorations,nocaves,nodungeons,nolight,nodecorations
@@ -910,8 +941,6 @@ mgv5_np_cave2 (Mapgen v5 cave2 noise parameters) noise_params 0, 12, (50, 50, 50
 
 #    Map generation attributes specific to Mapgen v6.
 #    When snowbiomes are enabled jungles are automatically enabled, the 'jungles' flag is ignored.
-#    The default flags set in the engine are: biomeblend, mudflow
-#    The flags string modifies the engine defaults.
 #    Flags that are not specified in the flag string are not modified from the default.
 #    Flags starting with 'no' are used to explicitly disable them.
 mgv6_spflags (Mapgen v6 flags) flags jungles,biomeblend,mudflow,snowbiomes,trees jungles,biomeblend,mudflow,snowbiomes,flat,trees,nojungles,nobiomeblend,nomudflow,nosnowbiomes,noflat,notrees
@@ -936,15 +965,27 @@ mgv6_np_apple_trees (Mapgen v6 apple trees noise parameters) noise_params 0, 1,
 [***Mapgen v7]
 
 #    Map generation attributes specific to Mapgen v7.
-#    The 'ridges' flag controls the rivers.
-#    The default flags set in the engine are: mountains, ridges
-#    The flags string modifies the engine defaults.
+#    The 'ridges' flag enables the rivers.
+#    Floatlands are currently experimental and subject to change.
 #    Flags that are not specified in the flag string are not modified from the default.
 #    Flags starting with 'no' are used to explicitly disable them.
-mgv7_spflags (Mapgen v7 flags) flags mountains,ridges mountains,ridges,nomountains,noridges
+mgv7_spflags (Mapgen v7 flags) flags mountains,ridges mountains,ridges,floatlands,nomountains,noridges,nofloatlands
 
 #    Controls width of tunnels, a smaller value creates wider tunnels.
-mgv7_cave_width (Mapgen v7 cave width) float 0.3
+mgv7_cave_width (Mapgen v7 cave width) float 0.09
+
+#    Controls the density of floatland mountain terrain.
+#    Is an offset added to the 'np_mountain' noise value.
+mgv7_float_mount_density (Mapgen v7 floatland mountain density) float 0.6
+
+#    Typical maximum height, above and below midpoint, of floatland mountain terrain.
+mgv7_float_mount_height (Mapgen v7 floatland mountain height) float 128.0
+
+#    Y-level of floatland midpoint and lake surface.
+mgv7_floatland_level (Mapgen v7 floatland level) int 1280
+
+#    Y-level to which floatland shadows extend.
+mgv7_shadow_limit (Mapgen v7 shadow limit) int 1024
 
 mgv7_np_terrain_base (Mapgen v7 terrain base noise parameters) noise_params 4, 70, (600, 600, 600), 82341, 5, 0.6, 2.0
 mgv7_np_terrain_alt (Mapgen v7 terrain altitude noise parameters) noise_params 4, 25, (600, 600, 600), 5934, 5, 0.6, 2.0
@@ -952,18 +993,18 @@ mgv7_np_terrain_persist (Mapgen v7 terrain persistation noise parameters) noise_
 mgv7_np_height_select (Mapgen v7 height select noise parameters) noise_params -8, 16, (500, 500, 500), 4213, 6, 0.7, 2.0
 mgv7_np_filler_depth (Mapgen v7 filler depth noise parameters) noise_params 0, 1.2, (150, 150, 150), 261, 3, 0.7, 2.0
 mgv7_np_mount_height (Mapgen v7 mount height noise parameters) noise_params 256, 112, (1000, 1000, 1000), 72449, 3, 0.6, 2.0
-mgv7_np_ridge_uwater (Mapgen v7 ridge water noise parameters) noise_params 0, 1, (1000, 1000, 1000), 85039, 5, 0.6, 2.0
+mgv7_np_ridge_uwater (Mapgen v7 river course noise parameters) noise_params 0, 1, (1000, 1000, 1000), 85039, 5, 0.6, 2.0
+mgv7_np_floatland_base (Mapgen v7 floatland base terrain noise parameters) noise_params -0.6, 1.5, (600, 600, 600), 114, 5, 0.6, 2.0
+mgv7_np_float_base_height (Mapgen v7 floatland base terrain height noise parameters) noise_params 48, 24, (300, 300, 300), 907, 4, 0.7, 2.0
 mgv7_np_mountain (Mapgen v7 mountain noise parameters) noise_params -0.6, 1, (250, 350, 250), 5333, 5, 0.63, 2.0
-mgv7_np_ridge (Mapgen v7 ridge noise parameters) noise_params 0, 1, (100, 100, 100), 6467, 4, 0.75, 2.0
-mgv7_np_cave1 (Mapgen v7 cave1 noise parameters) noise_params 0, 12, (100, 100, 100), 52534, 4, 0.5, 2.0
-mgv7_np_cave2 (Mapgen v7 cave2 noise parameters) noise_params 0, 12, (100, 100, 100), 10325, 4, 0.5, 2.0
+mgv7_np_ridge (Mapgen v7 river channel wall noise parameters) noise_params 0, 1, (100, 100, 100), 6467, 4, 0.75, 2.0
+mgv7_np_cave1 (Mapgen v7 cave1 noise parameters) noise_params 0, 12, (61, 61, 61), 52534, 3, 0.5, 2.0
+mgv7_np_cave2 (Mapgen v7 cave2 noise parameters) noise_params 0, 12, (67, 67, 67), 10325, 3, 0.5, 2.0
 
 [***Mapgen flat]
 
 #    Map generation attributes specific to Mapgen flat.
 #    Occasional lakes and hills can be added to the flat world.
-#    The default flags set in the engine are: none
-#    The flags string modifies the engine defaults.
 #    Flags that are not specified in the flag string are not modified from the default.
 #    Flags starting with 'no' are used to explicitly disable them.
 mgflat_spflags (Mapgen flat flags) flags  lakes,hills,,nolakes,nohills
@@ -975,7 +1016,7 @@ mgflat_ground_level (Mapgen flat ground level) int 8
 mgflat_large_cave_depth (Mapgen flat large cave depth) int -33
 
 #    Controls width of tunnels, a smaller value creates wider tunnels.
-mgflat_cave_width (Mapgen flat cave width) float 0.3
+mgflat_cave_width (Mapgen flat cave width) float 0.09
 
 #    Terrain noise threshold for lakes.
 #    Controls proportion of world area covered by lakes.
@@ -999,13 +1040,13 @@ mgflat_hill_steepness (Mapgen flat hill steepness) float 64.0
 mgflat_np_terrain (Mapgen flat terrain noise parameters) noise_params 0, 1, (600, 600, 600), 7244, 5, 0.6, 2.0
 
 mgflat_np_filler_depth (Mapgen flat filler depth noise parameters) noise_params 0, 1.2, (150, 150, 150), 261, 3, 0.7, 2.0
-mgflat_np_cave1 (Mapgen flat cave1 noise parameters) noise_params 0, 12, (128, 128, 128), 52534, 4, 0.5, 2.0
-mgflat_np_cave2 (Mapgen flat cave2 noise parameters) noise_params 0, 12, (128, 128, 128), 10325, 4, 0.5, 2.0
+mgflat_np_cave1 (Mapgen flat cave1 noise parameters) noise_params 0, 12, (61, 61, 61), 52534, 3, 0.5, 2.0
+mgflat_np_cave2 (Mapgen flat cave2 noise parameters) noise_params 0, 12, (67, 67, 67), 10325, 3, 0.5, 2.0
 
 [***Mapgen fractal]
 
 #    Controls width of tunnels, a smaller value creates wider tunnels.
-mgfractal_cave_width (Mapgen fractal cave width) float 0.3
+mgfractal_cave_width (Mapgen fractal cave width) float 0.09
 
 #    Choice of 18 fractals from 9 formulas.
 #    1 = 4D "Roundy" mandelbrot set.
@@ -1066,8 +1107,8 @@ mgfractal_julia_w (Mapgen fractal julia w) float 0.33
 
 mgfractal_np_seabed (Mapgen fractal seabed noise parameters) noise_params -14, 9, (600, 600, 600), 41900, 5, 0.6, 2.0
 mgfractal_np_filler_depth (Mapgen fractal filler depth noise parameters) noise_params 0, 1.2, (150, 150, 150), 261, 3, 0.7, 2.0
-mgfractal_np_cave1 (Mapgen fractal cave1 noise parameters) noise_params 0, 12, (128, 128, 128), 52534, 4, 0.5, 2.0
-mgfractal_np_cave2 (Mapgen fractal cave2 noise parameters) noise_params 0, 12, (128, 128, 128), 10325, 4, 0.5, 2.0
+mgfractal_np_cave1 (Mapgen fractal cave1 noise parameters) noise_params 0, 12, (61, 61, 61), 52534, 3, 0.5, 2.0
+mgfractal_np_cave2 (Mapgen fractal cave2 noise parameters) noise_params 0, 12, (67, 67, 67), 10325, 3, 0.5, 2.0
 
 # Mapgen Valleys parameters
 [***Mapgen Valleys]
@@ -1079,8 +1120,6 @@ mgfractal_np_cave2 (Mapgen fractal cave2 noise parameters) noise_params 0, 12, (
 #    'altitude_chill' makes higher elevations colder, which may cause biome issues.
 #    'humid_rivers' modifies the humidity around rivers and in areas where water would tend to pool,
 #    it may interfere with delicately adjusted biomes.
-#    The default flags set in the engine are: altitude_chill, humid_rivers
-#    The flags string modifies the engine defaults.
 #    Flags that are not specified in the flag string are not modified from the default.
 #    Flags starting with 'no' are used to explicitly disable them.
 mg_valleys_spflags (Valleys C Flags) flags altitude_chill,humid_rivers altitude_chill,noaltitude_chill,humid_rivers,nohumid_rivers
@@ -1109,16 +1148,16 @@ mgvalleys_river_size (River Size) int 5
 mgvalleys_water_features (Water Features) int 0
 
 #    Controls width of tunnels, a smaller value creates wider tunnels.
-mgvalleys_cave_width (Cave width) float 0.3
+mgvalleys_cave_width (Cave width) float 0.09
 
 # Noise parameters
 [****Noises]
 
 # Caves and tunnels form at the intersection of the two noises
-mgvalleys_np_cave1 (Cave noise #1) noise_params 0, 12, (100, 100, 100), 52534, 4, 0.5, 2.0
+mgvalleys_np_cave1 (Cave noise #1) noise_params 0, 12, (61, 61, 61), 52534, 3, 0.5, 2.0
 
 # Caves and tunnels form at the intersection of the two noises
-mgvalleys_np_cave2 (Cave noise #2) noise_params 0, 12, (100, 100, 100), 10325, 4, 0.5, 2.0
+mgvalleys_np_cave2 (Cave noise #2) noise_params 0, 12, (67, 67, 67), 10325, 3, 0.5, 2.0
 
 # The depth of dirt or other filler
 mgvalleys_np_filler_depth (Filler Depth) noise_params 0, 1.2, (256, 256, 256), 1605, 3, 0.5, 2.0
@@ -1153,10 +1192,55 @@ secure.enable_security (Enable mod security) bool false
 #    functions even when mod security is on (via request_insecure_environment()).
 secure.trusted_mods (Trusted mods) string
 
-#	Comma-seperated list of mods that are allowed to access HTTP APIs, which
+#	Comma-separated list of mods that are allowed to access HTTP APIs, which
 #	allow them to upload and download data to/from the internet.
 secure.http_mods (HTTP Mods) string
 
+[*Advanced]
+
+[**Profiling]
+#    Load the game profiler to collect game profiling data.
+#    Provides a /profiler command to access the compiled profile.
+#    Useful for mod developers and server operators.
+profiler.load (Load the game profiler) bool false
+
+#    The default format in which profiles are being saved,
+#    when calling `/profiler save [format]` without format.
+profiler.default_report_format (Default report format) enum txt txt,csv,lua,json,json_pretty
+
+#    The file path relative to your worldpath in which profiles will be saved to.
+#
+profiler.report_path (Report path) string ""
+
+[***Instrumentation]
+
+#    Instrument the methods of entities on registration.
+instrument.entity (Entity methods) bool true
+
+#    Instrument the action function of Active Block Modifiers on registration.
+instrument.abm (Active Block Modifiers) bool true
+
+#    Instrument the action function of Loading Block Modifiers on registration.
+instrument.lbm (Loading Block Modifiers) bool true
+
+#    Instrument chatcommands on registration.
+instrument.chatcommand (Chatcommands) bool true
+
+#    Instrument global callback functions on registration.
+#    (anything you pass to a minetest.register_*() function)
+instrument.global_callback (Global callbacks) bool true
+
+[****Advanced]
+#    Instrument builtin.
+#    This is usually only needed by core/builtin contributors
+instrument.builtin (Builtin) bool false
+
+#    Have the profiler instrument itself:
+#     * Instrument an empty function.
+#       This estimates the overhead, that instrumentation is adding (+1 function call).
+#     * Instrument the sampler being used to update the statistics.
+instrument.profiler (Profiler) bool false
+
 [Client and Server]
 
 #    Name of the player.
@@ -1166,7 +1250,7 @@ name (Player name) string
 
 #    Set the language. Leave empty to use the system language.
 #    A restart is required after changing this.
-language (Language) enum   ,be,cs,da,de,eo,es,et,fr,hu,id,it,ja,jbo,ko,ky,lt,nb,nl,pl,pt,pt_BR,ro,ru,tr,uk,zh_CN,zh_TW
+language (Language) enum   ,be,ca,cs,da,de,en,eo,es,et,fr,he,hu,id,it,ja,jbo,ko,ky,lt,nb,nl,pl,pt,pt_BR,ro,ru,sr_Cyrl,tr,uk,zh_CN,zh_TW
 
 #    Level of logging to be written to debug.txt:
 #    -    <nothing> (no logging)
@@ -1212,3 +1296,6 @@ modstore_download_url (Modstore download URL) string https://forum.minetest.net/
 modstore_listmods_url (Modstore mods list URL) string https://forum.minetest.net/mmdb/mods/
 
 modstore_details_url (Modstore details URL) string https://forum.minetest.net/mmdb/mod/*/
+
+#    Print the engine's profiling data in regular intervals (in seconds). 0 = disable. Useful for developers.
+profiler_print_interval (Engine profiling data print interval) int 0