Incremental Improvements to DHT:

Added Knowledge of Friends, Friends of Friends and Relays.
	- Added bdfriendlist class to store information.
	- New interface function updateKnownPeer().
	- includes IP addresses, if known. (for filtering)

Bad Peer Filtering.
	- Check IDs against known peer IP addresses.
	- Added checks in checkPotentialPeer().
	- Added checks in addPeer().
	- Running in TestMode at the moment (Bad Peers are only flagged).

Other Fixes:
	- Removed some warning about int/uint comparisons.
	- added bdSpace::flagpeer() fn to support above.



git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-dhtmods@4680 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libbitdht/src/bitdht/bdmanager.h

@@ -102,6 +102,9 @@ class bdNodeManager: public bdNode, public BitDhtInterface
 void 	iteration();
 
         /***** Functions to Call down to bdNodeManager ****/
+        /* Friend Tracking */
+virtual void updateKnownPeer(const bdId *id, uint32_t type, uint32_t flags);
+
         /* Request DHT Peer Lookup */
         /* Request Keyword Lookup */
 virtual void addFindNode(bdNodeId *id, uint32_t mode);