If a DNS exception were raised during the loop, the dns_update message
were destroyed. On the next iteration of the loop, exception were raised
because of the NoneType instead of really trying next DNS server.

Thanks to Sebastien K. for the report and the debug !

acme_dns_tiny: skip validated authorization, add more information about authorization status and raise error if no dns-challenge has been found

Indeed, dnspython has only documented usage of IP address and not domain name.

Fix #11 (compatibility with dnspython 2.0)

Fix debug output message

See merge request !25

staging acme_dns_tiny: use same account key for all tests, remove tests which...

See merge request !24

staging acme_dns_tiny: use same account key for all tests, remove tests which were testing server exceptions

Follow the ACME RFC 8555

See merge request !23

Indeed, the token is created by the server

Accept critical SAN extension and improve a bit regexp

Closes #9 et #10

See merge request !22

See [upstream reference](https://github.com/diafygi/acme-tiny/commit/58752c527c9345d23a771d2a93f729aaa8fe7712).

Closes #10

See: https://github.com/diafygi/acme-tiny/issues/216

Closes #9

Improve gitlab ci

See merge request !21