moved rsGlobalShutDown from MainWindow::doQuit to main

rsGlobalShutDown now cleans the threads and some memory on exit

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@3028 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/ft/ftserver.h

@@ -98,6 +98,7 @@ void    SetupFtServer(NotifyBase *cb);
 void    connectToTurtleRouter(p3turtle *p) ;
 
 void	StartupThreads();
+void	StopThreads();
 
 	/* own thread */
 virtual void	run();