Add server side ncurses terminal

This adds a chat console the server owner can use for administration
or to talk with players.
It runs in its own thread, which makes the user interface immune to
the server's lag, behaving just like a client, except timeout.
As it uses the same console code as the f10 console, things like nick
completion or a scroll buffer basically come for free.
The terminal itself is written in a general way so that adding a
client version later on is just about implementing an interface.

Fatal errors are printed after the console exists and the ncurses
terminal buffer gets cleaned up with endwin(), so that the error still
remains visible.

The server owner can chose their username their entered text will
have in chat and where players can send PMs to.
Once the username is secured with a password to prevent anybody to
take over the server, the owner can execute admin tasks over the
console.

This change includes a contribution by @kahrl who has improved ncurses
library detection.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/unittest/test_utilities.cpp b/src/unittest/test_utilities.cpp
index 3c000e760..1785997de 100644
--- a/src/unittest/test_utilities.cpp
+++ b/src/unittest/test_utilities.cpp
@@ -43,6 +43,7 @@ public:
 	void testStrToIntConversion();
 	void testStringReplace();
 	void testStringAllowed();
+	void testAsciiPrintableHelper();
 	void testUTF8();
 	void testWrapRows();
 	void testIsNumber();
@@ -68,6 +69,7 @@ void TestUtilities::runTests(IGameDef *gamedef)
 	TEST(testStrToIntConversion);
 	TEST(testStringReplace);
 	TEST(testStringAllowed);
+	TEST(testAsciiPrintableHelper);
 	TEST(testUTF8);
 	TEST(testWrapRows);
 	TEST(testIsNumber);
@@ -232,6 +234,18 @@ void TestUtilities::testStringAllowed()
 	UASSERT(string_allowed_blacklist("hello123", "123") == false);
 }
 
+void TestUtilities::testAsciiPrintableHelper()
+{
+	UASSERT(IS_ASCII_PRINTABLE_CHAR('e') == true);
+	UASSERT(IS_ASCII_PRINTABLE_CHAR('\0') == false);
+
+	// Ensures that there is no cutting off going on...
+	// If there were, 331 would be cut to 75 in this example
+	// and 73 is a valid ASCII char.
+	int ch = 331;
+	UASSERT(IS_ASCII_PRINTABLE_CHAR(ch) == false);
+}
+
 void TestUtilities::testUTF8()
 {
 	UASSERT(wide_to_utf8(utf8_to_wide("")) == "");