code: func NewProviderServer(iface, port string) *ProviderServer {
  	return &ProviderServer{iface: iface, port: port}
  }
docs: // NewProviderServer creates a new ProviderServer on the selected interface and port.
  // Setting iface and / or port to an empty string will make the server fall back to
  // the "any" interface and port 80 respectively.