Change a member of the friendslist module to better reflect the client side

data storage paradigm of the friends list and avoid repeated, unneccessary
fetches of the entire friends list.

OpenSim/Region/CoreModules/Avatar/Friends/FriendsModule.cs

@@ -84,9 +84,9 @@ namespace OpenSim.Region.CoreModules.Avatar.Friends
         {
         }
 
-        public List<FriendListItem> GetUserFriends(UUID agentID)
+        public uint GetFriendPerms(UUID principalID, UUID friendID)
         {
-            return null;
+            return 1;
         }
     }
 }