code: func ListenAndServeUNIX(addr string, mode os.FileMode, handler RequestHandler) error {
  	s := &Server{
  		Handler: handler,
  	}
  	return s.ListenAndServeUNIX(addr, mode)
  }
docs: // ListenAndServeUNIX serves HTTP requests from the given UNIX addr
  // using the given handler.
  //
  // The function deletes existing file at addr before starting serving.
  //
  // The server sets the given file mode for the UNIX addr.