Trying to fix server termination issue.

src/net/common/serverlobbythread.cpp

@@ -389,7 +389,12 @@ ServerLobbyThread::Main()
 		LOG_ERROR(e.what());
 	}
 
+	// Stop all running games.
 	TerminateGames();
+	// Remove all sessions.
+	m_gameSessionManager.Clear();
+	m_sessionManager.Clear();
+	// Stop sender thread.
 	m_sender->SignalStop();
 	m_sender->WaitStop();