Added request.Proxy=null everywhere, as discussed in http://stackoverflow.com/questions/2519655/httpwebrequest-is-extremely-slow.

Thanks R.Gunther (rigun@rigutech.nl) https://lists.berlios.de/pipermail/opensim-users/2012-September/010986.html

OpenSim/Region/CoreModules/Scripting/VectorRender/VectorRenderModule.cs

@@ -826,6 +826,7 @@ namespace OpenSim.Region.CoreModules.Scripting.VectorRender
             try
             {
                 WebRequest request = HttpWebRequest.Create(url);
+                request.Proxy = null;
 //Ckrinke: Comment out for now as 'str' is unused. Bring it back into play later when it is used.
 //Ckrinke            Stream str = null;
                 HttpWebResponse response = (HttpWebResponse)(request).GetResponse();