func register(global *flag.FlagSet, local *pflag.FlagSet, globalName string) {
	if f := global.Lookup(globalName); f != nil {
		pflagFlag := pflag.PFlagFromGoFlag(f)
		pflagFlag.Name = normalize(pflagFlag.Name)
		local.AddFlag(pflagFlag)
	} else {
		panic(fmt.Sprintf("failed to find flag in global flagset (flag): %s", globalName))
	}
}

// registerDeprecated registers the flag with register, and then marks it deprecated