* Cleanup of some memory consuming items on ScenePresence.Close().

* Untangled a tangly shutdown loop for the ScenePresence.
* Suggested to the Garbage Collector that this may be a good time to >.>, <.< *gasp* collect the memory.

OpenSim/Region/ClientStack/ClientView.cs

@@ -267,7 +267,7 @@ namespace OpenSim.Region.ClientStack
             // We can't reach into other scenes and close the connection 
             // We need to do this over grid communications
             //m_scene.CloseAllAgents(CircuitCode);
-
+            GC.Collect();
             m_clientThread.Abort();
         }