More fixes. Using player name as base for game name now. Removing games which have no players left. Check collision of all player names on connect (kind of slow, but name needs to be unique).

src/net/sessionmanager.h

@@ -46,6 +46,8 @@ public:
 	SessionManager();
 	virtual ~SessionManager();
 
+	bool HasSessions() const;
+
 	void AddSession(boost::shared_ptr<SessionData> sessionData); // new Sessions without player data
 	void AddSession(SessionWrapper session);
 	void SetSessionPlayerData(SOCKET session, boost::shared_ptr<PlayerData> playerData);