code: func TCPRedirectHandler(opts ...HandlerOption) Handler {
  	h := &tcpRedirectHandler{
  		options: &HandlerOptions{
  			Chain: new(Chain),
  		},
  	}
  	for _, opt := range opts {
  		opt(h.options)
  	}
  	return h
  }
docs: // TCPRedirectHandler creates a server Handler for TCP redirect server.