FIX: A bug was found and fixed relating to DNS zone edits for the wildcard functionality.
It would manifest itself as a failure on the first attempt, and success on the second attempt.
No existing certificates will be adversely affected.
IMPROVEMENT: DNS validation will now attempt to verify that the updated DNS records are propagated before attempting to use them.
Previously, WHM admins would need to tune the DNS Challenge Delay (see 0.13.0 release notes).
That tuning is still possible, but the plugin will also spend upto 3 * challenge_delay waiting for the record to be actively served by the nameserver. By default, this is 3 * 5 seconds = 15 seconds.
This is done via a non-caching iterative DNS query descending from the root nameservers.