code: func GenVoltDB(u *URL) (string, error) {
  	host, port := "localhost", "21212"
  	if h := hostname(u.Host); h != "" {
  		host = h
  	}
  	if p := hostport(u.Host); p != "" {
  		port = p
  	}
  	return host + ":" + port, nil
  }
docs: // GenVoltDB generates a VoltDB DSN from the passed URL.