provider/designate.go
func canonicalizeDomainNames(domains []string) []string {
	var cDomains []string
	for _, d := range domains {
		if !strings.HasSuffix(d, ".") {
			d += "."
			cDomains = append(cDomains, strings.ToLower(d))
		}
	}
	return cDomains
}
func canonicalizeDomainNames(domains []string) []string {
	var cDomains []string
	for _, d := range domains {
		if !strings.HasSuffix(d, ".") {
			d += "."
			cDomains = append(cDomains, strings.ToLower(d))
		}
	}
	return cDomains
}
// converts domain names to FQDN