Cleanup client init states by bumping protocol version

Don't use TOSERVER_RECEIVED_MEDIA but TOSERVER_CLIENT_READY as indicatio for client ready
Handle clients with protocol version < 23 (almost) same way as before
Make client tell server about it's version
Add client state to not send bogus player position updates prior init complete
Add access to statistics information (peer connction time,rtt,version)
Fix clients standing stalled in world while preloading item visuals (new clients only)
Add get_player_information to read client specific information from lua

src/client.h

@@ -57,6 +57,12 @@ struct QueuedMeshUpdate
 	~QueuedMeshUpdate();
 };
 
+enum LocalClientState {
+	LC_Created,
+	LC_Init,
+	LC_Ready
+};
+
 /*
 	A thread-safe queue of mesh update tasks
 */
@@ -319,14 +325,7 @@ public:
 		calling this, as it is sent in the initialization.
 	*/
 	void connect(Address address);
-	/*
-		returns true when
-			m_con.Connected() == true
-			AND m_server_ser_ver != SER_FMT_VER_INVALID
-		throws con::PeerNotFoundException if connection has been deleted,
-		eg. timed out.
-	*/
-	bool connectedAndInitialized();
+
 	/*
 		Stuff that references the environment is valid only as
 		long as this is not called. (eg. Players)
@@ -354,6 +353,7 @@ public:
 	void sendDamage(u8 damage);
 	void sendBreath(u16 breath);
 	void sendRespawn();
+	void sendReady();
 
 	ClientEnvironment& getEnv()
 	{ return m_env; }
@@ -454,6 +454,8 @@ public:
 	// Send a notification that no conventional media transfer is needed
 	void received_media();
 
+	LocalClientState getState() { return m_state; }
+
 private:
 
 	// Virtual methods from con::PeerHandler
@@ -537,6 +539,9 @@ private:
 
 	// Storage for mesh data for creating multiple instances of the same mesh
 	std::map<std::string, std::string> m_mesh_data;
+
+	// own state
+	LocalClientState m_state;
 };
 
 #endif // !CLIENT_HEADER