func runList(writer io.Writer) error {
	// Sort flag names
	keys := make([]string, len(settableFlags))
	i := 0
	for key := range settableFlags {
		keys[i] = key
		i++
	}
	sort.Strings(keys)
	w := new(tabwriter.Writer).Init(writer, 0, 8, 5, ' ', 0)
	fmt.Fprintf(w, "FLAG\tVALUE\tFROM\n")
	for _, flag := range keys {
		v := settableFlags[flag]
		fmt.Fprintf(w, "%s\t%s\t%v\n", flag, viper.GetString(flag), configSource(flag, v))
	}

		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 != "" {
		isEnableFlagExplicitlySet = true
		l.LDAP.Enabled, err = config.ParseBool(v)
		if err != nil {
			return l, err
		}
	}

// variables for which support needs to be added.
//
// When redactSecrets is true, the returned value is empty if the configuration
// parameter is a secret, and the returned isRedacted flag is set.
func (c Config) ResolveConfigParam(subSys, target, cfgParam string, redactSecrets bool,
) (value string, cs ValueSource, isRedacted bool) {
	// cs = ValueSourceAbsent initially as it is iota by default.