Breaking and behavior changes:
* Automatically resolve zone name and authoritative name servers
* A new configuration file is required due to this new functionality:
* DNS section is fully optional
* DNS section only contains `Timeout` and `NameServer` options
* Now acme-dns-tiny uses by default the system name server to query DNS resources
(you can specify other with the new `NameServer` option).
* With the help of `SOA` and `NS` DNS resource records, `acme-dns-tiny` is able to
automatically find the DNS authoritative server where to install ACME DNS-01 challenges.
See [commit message](https://projects.adorsaz.ch/adrien/acme-dns-tiny/-/commit/540c3d72223a604766def58ee8d6b5215d6e07da)
for more details.
* Requests sent to ACME server and DNS server have a default timeout to 10 seconds
* Before, acme-dns-tiny could hand forever waiting for a HTTP or DNS response
* dnspython >= 1.16 is required due to this new functionality
Improvements
* use Python context manager to run `openssl` commands
Continuous Integration:
* add tests to keep coherent code style (linters for YAML and python files)
* run `check` stage with Debian Bullseye
* git default branch is now `main` instead of `master`