[Modify] Use it

websocket-sharp/Server/WebSocketServer.cs

@@ -630,13 +630,10 @@ namespace WebSocketSharp.Server
         return;
       }
 
-      if (_dnsStyle) {
+      if (!checkHostName (uri.DnsSafeHost)) {
-        var hostname = uri.DnsSafeHost;
-        if (Uri.CheckHostName (hostname) == UriHostNameType.Dns && hostname != _hostname) {
         context.Close (HttpStatusCode.NotFound);
         return;
       }
-      }
 
       WebSocketServiceHost host;
       if (!_services.InternalTryGetServiceHost (uri.AbsolutePath, out host)) {