req, err := http.NewRequestWithContext(ctx, http.MethodHead, u.String(), nil)
	if err != nil {
		authNLogIf(ctx, err)
		return false
	}

	if o.args.AuthToken != "" {
		req.Header.Set("Authorization", o.args.AuthToken)
	}

	resp, err := o.client.Do(req)
	if err != nil {
		return false
	}
	defer o.args.CloseRespFn(resp.Body)
	return true
}

var (
	healthCheckInterval = 1 * time.Minute

		return val
	}

	ldapServer := getCfgVal(ServerAddr)
	if ldapServer == "" {
		return l, nil
	}
	l.LDAP = ldap.Config{
		RootCAs:       rootCAs,
		ServerAddr:    ldapServer,
		SRVRecordName: getCfgVal(SRVRecordName),
	}

	// Parse explicitly set enable=on/off flag.
	isEnableFlagExplicitlySet := false
	if v := getCfgVal(config.Enable); v != "" {