Merge of branch v0.6-rssocialnet 7419 to 7488. Changes from electron and myself:

- added possibility to modify groups (e.g. edit circles)
- fixed mismatched free/delete in fimonitor.cc, authssl.cc, pqibin.cc (saving encrypted hash cache file)
- improved plugin interface class to allow plugins to access GXS objects.
- added method to un-register notify clients from RsNotify
- fixed pqisslproxy for windows, due to win not properly supporting sockets in non blocking mode.
- removed static members form RsInitConfig and made RsAccounts object a pointer. This prevents plugin initialisation problems at symbol resolving time.
- removed bool return from p3IdService::getOwnIds()



git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7492 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/retroshare/rsnotify.h

@@ -162,6 +162,8 @@ class RsNotify
 	public:
 		/* registration of notifies clients */
 		virtual void registerNotifyClient(NotifyClient *nc) = 0;
+        /* returns true if NotifyClient was found */
+        virtual bool unregisterNotifyClient(NotifyClient *nc) = 0;
 
 		/* Pull methods for retroshare-gui                   */
 		/* this should probably go into a different service. */