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

But the patch is here, in case anyone wants to try it.

This reverts commit 531edd51d8.

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

@@ -826,7 +826,6 @@ 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();