Fixed (mono-)script handling for SL viewer 1.21:

- Added two missing caps (UpdateScriptAgent, UpdateScriptTask)
- Added one missing EventQueue event (ScriptRunningReply)
- Changed DNE and XEngine to use this new event
As we only use the mono engine anyway, the "Mono" checkbox is set by
default but doesn't have any function.

OpenSim/Region/ScriptEngine/XEngine/XEngine.cs

@@ -972,8 +972,17 @@ namespace OpenSim.Region.ScriptEngine.XEngine
             IScriptInstance instance = GetInstance(itemID);
             if (instance == null)
                 return;
-            controllingClient.SendScriptRunningReply(objectID, itemID,
-                    GetScriptState(itemID));
+            IEventQueue eq = World.RequestModuleInterface<IEventQueue>();
+            if (eq == null)
+            {
+                controllingClient.SendScriptRunningReply(objectID, itemID,
+                        GetScriptState(itemID));
+            }
+            else
+            {
+                eq.Enqueue(EventQueueHelper.ScriptRunningReplyEvent(objectID, itemID, GetScriptState(itemID), true),
+                           controllingClient.AgentId);
+            }
         }
     }
 }