func RegisterHelpSubSys(helpKVSMap map[string]HelpKVS) {
	for subSys, hkvs := range helpKVSMap {
		HelpSubSysMap[subSys] = hkvs
	}
}

// HelpDeprecatedSubSysMap - help for all deprecated sub-systems, that may be
// removed in the future.
var HelpDeprecatedSubSysMap = map[string]HelpKV{}

// RegisterHelpDeprecatedSubSys - saves input help KVS for deprecated
// sub-systems globally. Should be called only once at init.