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/retroshare/rstokenservice.h

@@ -189,6 +189,26 @@ public:
      */
     virtual uint32_t requestStatus(const uint32_t token) = 0;
 
+    /*!
+     * This request statistics on amount of data held
+     * number of groups
+     * number of groups subscribed
+     * number of messages
+     * size of db store
+     * total size of messages
+     * total size of groups
+     * @param token
+     */
+    virtual void requestServiceStatistic(const uint32_t& token) = 0;
+
+	/*!
+	 * To request statistic on a group
+	 * @param token set to value to be redeemed to get statistic
+	 * @param grpId the id of the group
+	 */
+	virtual void requestGroupStatistic(const uint32_t& token, const RsGxsGroupId& grpId) = 0;
+
+
         /* Cancel Request */
 
     /*!