Improvements to the ServiceThrottleModule: added a category and an itemid to the interface, so that duplicate requests aren't enqueued more than once.

OpenSim/Region/Framework/Interfaces/IServiceThrottleModule.cs

@@ -5,7 +5,15 @@ namespace OpenSim.Region.Framework.Interfaces
 {
     public interface IServiceThrottleModule
     {
-        void Enqueue(Action continuation);
+        /// <summary>
+        /// Enqueue a continuation meant to get a resource from elsewhere.
+        /// As usual with CPS, caller beware: if that continuation is a never-ending computation,
+        /// the whole thread will be blocked, and no requests are processed
+        /// </summary>
+        /// <param name="category">Category of the resource (e.g. name, region)</param>
+        /// <param name="itemid">The resource identifier</param>
+        /// <param name="continuation">The continuation to be executed</param>
+        void Enqueue(string category, string itemid, Action continuation);
     }
 
 }