code: func New(dialer httpstream.Dialer, ports []string, stopChan <-chan struct{}, readyChan chan struct{}, out, errOut io.Writer) (*PortForwarder, error) {
  	return NewOnAddresses(dialer, []string{"localhost"}, ports, stopChan, readyChan, out, errOut)
  }
docs: // New creates a new PortForwarder with localhost listen addresses.