Add confirmation on new player registration (#6849)

* Attempt to add registration confirmation

Using SRP auth mechanism, if server sent AUTH_MECHANISM_FIRST_SRP that means the player isn't exist.
Also tell player about the server and chosen username.
Local game has localhost as IP address of the server.
Add RenderingEngine::draw_menu_scene() to draw GUI and clouds background.
aborted -> connection_aborted

* Rewrite information message text

Client::promptConfirmRegister() -> Client::promptConfirmRegistration()

1 files changed, 4 insertions, 0 deletions

diff --git a/src/client.h b/src/client.h
index f5929e055..11f27e9bd 100644
--- a/src/client.h
+++ b/src/client.h
@@ -345,6 +345,9 @@ public:
 	{ return m_proto_ver; }
 
 	bool connectedToServer();
+	void confirmRegistration();
+	bool m_is_registration_confirmation_state = false;
+	bool m_simple_singleplayer_mode;
 
 	float mediaReceiveProgress();
 
@@ -448,6 +451,7 @@ private:
 	static AuthMechanism choseAuthMech(const u32 mechs);
 
 	void sendInit(const std::string &playerName);
+	void promptConfirmRegistration(AuthMechanism chosen_auth_mechanism);
 	void startAuth(AuthMechanism chosen_auth_mechanism);
 	void sendDeletedBlocks(std::vector<v3s16> &blocks);
 	void sendGotBlocks(v3s16 block);