more GXS changes for phase1

clean up now on by default
- unsubscription from group also leads to message clean up
- check for keep flag

added functions to retrieve stats 
- not active yet

fixed forum authen flag 
- do not need author to create group
- also policy variable not initialised correctly

added KEEP and DELETE flag 

improved GXS resilience to peers sending NULL grp/msg binary data for deserialisation (peers could crash other peer by sending empty RsTlvBinaryData)

rstokenservice iface affected so full recompile recommended

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@6274 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/gxs/rsgxsdataaccess.cc

@@ -269,6 +269,17 @@ bool RsGxsDataAccess::requestMsgInfo(uint32_t &token, uint32_t ansType,
         return true;
 }
 
+
+void RsGxsDataAccess::requestServiceStatistic(const uint32_t& token)
+{
+
+}
+
+void RsGxsDataAccess::requestGroupStatistic(const uint32_t& token, const RsGxsGroupId& grpId)
+{
+
+}
+
 bool RsGxsDataAccess::requestMsgRelatedInfo(uint32_t &token, uint32_t ansType, const RsTokReqOptions &opts,
                                             const std::vector<RsGxsGrpMsgIdPair> &msgIds)
 {