* refactor: make shutdown a template method in the same manner as startup, for consistency's sake

OpenSim/Grid/GridServer/GridServerBase.cs

@@ -167,11 +167,9 @@ namespace OpenSim.Grid.GridServer
             */
         }
 
-        public override void Shutdown()
+        protected override void ShutdownSpecific()
         {
             foreach (IGridPlugin plugin in m_plugins) plugin.Dispose();
-
-            base.Shutdown();
         }
     }
 }

OpenSim/Grid/MessagingServer/Main.cs

@@ -160,11 +160,9 @@ namespace OpenSim.Grid.MessagingServer
             m_console.Notice("clear-cache - Clears region cache.  Should be done when regions change position.  The region cache gets stale after a while.");
         }
 
-        public override void Shutdown()
+        protected override void ShutdownSpecific()
         {
             msgsvc.deregisterWithUserServer();
-
-            base.Shutdown();
         }
     }
 }

OpenSim/Grid/UserServer/Main.cs

@@ -392,11 +392,9 @@ namespace OpenSim.Grid.UserServer
             
         }
 
-        public override void Shutdown()
+        protected override void ShutdownSpecific()
         {
             m_loginService.OnUserLoggedInAtLocation -= NotifyMessageServersUserLoggedInToLocation;
-          
-            base.Shutdown();
         }
 
         public void TestResponse(List<InventoryFolderBase> resp)