* add API for Gandi LiveDNS
* ensure Gandi API key is saved for renewing certificate.
* gandi_livedns: use PUT instead of POST for creating DNS record
* gandi_livedns: fix formatting
* dns_gandi_livedns: fix shellcheck errors
Clear OTP secret if environment variable is set to empty. This is for when the 2FA is disabled.
Rename `_is_idn` function to `_is_idn_cyon`.
Remove usage of curl (except for URL encoding of data).
Instead of cleaning up the cookie jar, get rid of it completely and logout of cyon instead.