turn off Nangle on users of ServivePointManager like webrequests

OpenSim/Region/Application/Application.cs

@@ -75,6 +75,7 @@ namespace OpenSim
                 new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
 
             ServicePointManager.DefaultConnectionLimit = 12;
+            ServicePointManager.UseNagleAlgorithm = false;
 
             // Add the arguments supplied when running the application to the configuration
             ArgvConfigSource configSource = new ArgvConfigSource(args);