Better fix for lobby room crash

Always use TCP connection when connecting to self-hosted lobby room.
Effectively reverts 1.6.6 change for lobby connections. Single-player
connections still use intra-process pseudo connection

Main problem is various side effects caused by changing order of
operations. For example, client may inform lobby about joining the room
before server finishes startup, which was not possible before.

client/ServerRunner.h

@@ -38,6 +38,7 @@ class ServerThreadRunner final : public IServerRunner, boost::noncopyable
 	std::unique_ptr<CVCMIServer> server;
 	boost::thread threadRunLocalServer;
 	uint16_t serverPort = 0;
+	bool lobbyMode = false;
 
 public:
 	void start(bool listenForConnections, bool connectToLobby, std::shared_ptr<StartInfo> startingInfo) override;