// help for each sub-system key.
var HelpSubSysMap = map[string]HelpKVS{}

// RegisterHelpSubSys - this function saves
// input help KVS for each sub-system globally,
// this function should be called only once
// preferably in during `init()`.
func RegisterHelpSubSys(helpKVSMap map[string]HelpKVS) {
	for subSys, hkvs := range helpKVSMap {
		HelpSubSysMap[subSys] = hkvs
	}
}

		config.CallhomeSubSys:       callhome.HelpCallhome,
		config.DriveSubSys:          drive.HelpDrive,
		config.CacheSubSys:          cache.Help,
		config.BrowserSubSys:        browser.Help,
	}

	config.RegisterHelpSubSys(helpMap)

	// save top-level help for deprecated sub-systems in a separate map.
	deprecatedHelpKVMap := map[string]config.HelpKV{
		config.RegionSubSys: {
			Key:         config.RegionSubSys,