decided to use polling and a database trigger to maintain consistentency of last group post for database sync

- db reset done, you will lose your current gxs data

git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-gxs_finale@6906 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/gxs/rsgxsnetservice.h

@@ -327,6 +327,8 @@ private:
     
     void locked_doMsgUpdateWork(const RsNxsTransac* nxsTrans, const std::string& grpId);
 
+    void updateServerSyncTS();
+
 private:
 
     typedef std::vector<RsNxsGrp*> GrpFragments;