Rather than instantiating a UTF8 encoding everywhere when we want to supress the BOM, use a single Util.UTF8NoBomEncoding.

This class is thread-safe (as evidenced by the provision of the system-wide Encoding.UTF8 which does not suppress BOM on output).

OpenSim/Server/Handlers/Hypergrid/HGFriendsServerPostHandler.cs

@@ -279,13 +279,11 @@ namespace OpenSim.Server.Handlers.Hypergrid
             }
 
             string xmlString = ServerUtils.BuildXmlResponse(result);
+
             //m_log.DebugFormat("[GRID HANDLER]: resp string: {0}", xmlString);
-            UTF8Encoding encoding = new UTF8Encoding();
-            return encoding.GetBytes(xmlString);
-
+            return Util.UTF8NoBomEncoding.GetBytes(xmlString);
         }
 
-
         #endregion
 
         #region Misc