revert stop call

shadowsocks-csharp/Controller/ShadowsocksController.cs

@@ -132,11 +132,6 @@ namespace Shadowsocks.Controller
             {
                 polipoRunner.Stop();
             }
-            if (pacServer != null)
-            {
-                pacServer.Stop();
-                pacServer = null;
-            }
             if (_config.enabled)
             {
                 SystemProxy.Disable();

shadowsocks-csharp/Program.cs

@@ -45,8 +45,6 @@ namespace Shadowsocks
                 controller.Start();
 
                 Application.Run();
-
-                controller.Stop();
             }
         }
     }