keep the sys proxy

v2rayN/v2rayN/HttpProxyHandler/HttpProxyHandle.cs

@@ -113,8 +113,11 @@ namespace v2rayN.HttpProxyHandler
         public static void CloseHttpAgent(Config config)
         {
             try
+            {
+                if (config.listenerType != 5 && config.listenerType != 6)
                 {
                     Update(config, true);
+                }
 
                 PrivoxyHandler.Instance.Stop();