When creating a network game, a client is also started.

Network errors are handled globally.
Fixed last network thread issue by using a notification queue, should work fine now.

src/session.h

@@ -38,6 +38,7 @@ public:
 	void deleteGame();
 
 	void startNetworkClient(const std::string &serverAddress, unsigned serverPort, bool ipv6, const std::string &pwd);
+	void startNetworkClientForLocalServer();
 	void terminateNetworkClient();
 
 	void startNetworkServer();