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/rsserver/p3face-config.cc

@@ -170,5 +170,7 @@ void RsServer::rsGlobalShutDown()
 	mChannels->cleanUpOldFiles();
 	ConfigFinalSave(); // save configuration before exit
 	mConnMgr->shutdown(); /* Handles UPnP */
-}
 
+	join();
+	ftserver->StopThreads();
+}