fix server restart

Emby.Server.Implementations/HttpServer/HttpListenerHost.cs

@@ -767,8 +767,6 @@ namespace Emby.Server.Implementations.HttpServer
         {
             if (_disposed) return;
 
-            Dispose();
-
             lock (_disposeLock)
             {
                 if (_disposed) return;

Emby.Server.Implementations/ServerManager/ServerManager.cs

@@ -303,6 +303,7 @@ namespace Emby.Server.Implementations.ServerManager
         /// </summary>
         private void DisposeHttpServer()
         {
+            _logger.Info("Disposing web socket connections");
             foreach (var socket in _webSocketConnections)
             {
                 // Dispose the connection
@@ -314,6 +315,9 @@ namespace Emby.Server.Implementations.ServerManager
             if (HttpServer != null)
             {
                 HttpServer.WebSocketConnected -= HttpServer_WebSocketConnected;
+
+                _logger.Info("Disposing http server");
+
                 HttpServer.Dispose();
             }
         }

MediaBrowser.ServerApplication/MainStartup.cs

@@ -676,6 +676,7 @@ namespace MediaBrowser.ServerApplication
 
                 _appHostDisposed = true;
                 _appHost.Dispose();
+                _logger.Info("App host dispose complete");
             }
         }