code: func GenFirebird(u *URL) (string, error) {
  	z := &url.URL{
  		User:     u.User,
  		Host:     u.Host,
  		Path:     u.Path,
  		RawPath:  u.RawPath,
  		RawQuery: u.RawQuery,
  		Fragment: u.Fragment,
  	}
  	return strings.TrimPrefix(z.String(), "//"), nil
  }
docs: // GenFirebird generates a firebirdsql DSN from the passed URL.