Checks if a subdomain already exists before creating one. The loopia API clears all records for a subdomain when adding it again.
Adding TXT-records instead of updating the existing record when using the add method. Wildcard certificates require multiple TXT-records for the same subdomain.
Now you can create wildcard certificates using:
`acme.sh --issue -d example.com -d '*.example.com' --dns dns_loopia`
Double quoting variables
