add recursive CNAME lookup support #1677
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Right now the
LEGO_EXPERIMENTAL_CNAME_SUPPORTonly follows one CNAME record. If this CNAME record points to another, then the chain breaks and the DNS record created is incorrect.This change allows it to keep following CNAME records as long as it continues to find one up to a limit so that CNAME loops don't hang the service.
And thanks for the awesome work on this repo!!