// 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.