Patch from Michael Osias IBM (jimbo2120)

In his own words: 
If a prim becomes a listener or remote channel and the script is deleted, it cannot become a listener or channel again with a new script.  
This patch fixes that.

OpenSim/Region/Environment/Interfaces/IWorldComm.cs

@@ -40,5 +40,6 @@ namespace OpenSim.Region.Environment.Interfaces
         ListenerInfo GetNextMessage();
         void ListenControl(int handle, int active);
         void ListenRemove(int handle);
+        void DeleteListener(LLUUID itemID);
     }
 }

OpenSim/Region/Environment/Interfaces/IXMLRPC.cs

@@ -39,5 +39,6 @@ namespace OpenSim.Region.Environment.Interfaces
         RPCRequestInfo GetNextRequest();
         void RemoteDataReply(string channel, string message_id, string sdata, int idata);
         bool IsEnabled();
+        void DeleteChannel(LLUUID itemID);
     }
 }

OpenSim/Region/Environment/Modules/WorldCommModule.cs

@@ -70,6 +70,7 @@ namespace OpenSim.Region.Environment.Modules
     {
         private Scene m_scene;
         private object CommListLock = new object();
+        private object ListLock = new object();
         private string m_name = "WorldCommModule";
         private ListenerManager m_listenerManager;
         private Queue<ListenerInfo> m_pending;
@@ -136,6 +137,15 @@ namespace OpenSim.Region.Environment.Modules
             m_listenerManager.Remove(handle);
         }
 
+        public void DeleteListener(LLUUID itemID)
+        {
+            lock (ListLock)
+            {
+                m_listenerManager.DeleteListener(itemID);
+            }
+
+        }
+
         // This method scans nearby objects and determines if they are listeners,
         // and if so if this message fits the filter.  If it does, then
         // enqueue the message for delivery to the objects listen event handler.
@@ -303,6 +313,18 @@ namespace OpenSim.Region.Environment.Modules
             m_listeners.Remove(handle);
         }
 
+        public void DeleteListener(LLUUID itemID)
+        {
+            foreach (ListenerInfo li in m_listeners.Values)
+            {
+                if (li.GetItemID().Equals(itemID))
+                {
+                    Remove(li.GetHandle());
+                    return;
+                }
+            }
+        }
+
         private int GetNewHandle()
         {
             for (int i = 0; i < int.MaxValue - 1; i++)

OpenSim/Region/Environment/Modules/XMLRPCModule.cs

@@ -188,6 +188,24 @@ namespace OpenSim.Region.Environment.Modules
             return channel;
         }
 
+        public void DeleteChannel(LLUUID itemID)
+        {
+
+            foreach (RPCChannelInfo li in m_openChannels.Values)
+            {
+
+                if (li.GetItemID().Equals(itemID))
+                {
+
+                    m_openChannels.Remove(li.GetChannelID());
+                    return;
+
+                }
+
+            }
+
+        }
+
         /**********************************************
          * Remote Data Reply
          * 
@@ -408,5 +426,6 @@ namespace OpenSim.Region.Environment.Modules
         {
             return m_localID;
         }
+
     }
 }

OpenSim/Region/ScriptEngine/Common/ScriptEngineBase/AsyncLSLCommandManager.cs

@@ -120,6 +120,13 @@ namespace OpenSim.Region.ScriptEngine.Common.ScriptEngineBase
             IHttpRequests iHttpReq =
                 m_ScriptEngine.World.RequestModuleInterface<IHttpRequests>();
             iHttpReq.StopHttpRequest(localID, itemID);
+
+            IWorldComm comms = m_ScriptEngine.World.RequestModuleInterface<IWorldComm>();
+            comms.DeleteListener(itemID);
+
+            IXMLRPC xmlrpc = m_ScriptEngine.World.RequestModuleInterface<IXMLRPC>();
+            xmlrpc.DeleteChannel(itemID);
+
         }
 
         #region TIMER