func canonicalizeDomainName(d string) string {
	if !strings.HasSuffix(d, ".") {
		d += "."
	}
	return strings.ToLower(d)
}
func canonicalizeDomainName(d string) string {
	if !strings.HasSuffix(d, ".") {
		d += "."
	}
	return strings.ToLower(d)
}
func canonicalizeDomainName ( d string ) string { if ! strings . HasSuffix ( d , " " ) { d += " " } return strings . ToLower ( d ) }
// converts domain name to FQDN
converts domain name to FQDN