Hook up deed permissions checking to the land module

OpenSim/Region/CoreModules/World/Land/LandManagementModule.cs

@@ -1132,13 +1132,15 @@ namespace OpenSim.Region.CoreModules.World.Land
 
         void handleParcelDeedToGroup(int parcelLocalID, UUID groupID, IClientAPI remote_client)
         {
-            // TODO: May want to validate that the group id is valid and that the remote client has the right to deed
             ILandObject land;
             lock (m_landList)
             {
                 m_landList.TryGetValue(parcelLocalID, out land);
             }
 
+            if (!m_scene.Permissions.CanDeedParcel(remote_client.AgentId, land))
+                return;
+
             if (land != null)
             {
                 land.deedToGroup(groupID);