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`

Fix typos on log messages. Thanks [cpswan](https://github.com/Trim/acme-dns-tiny/pull/6).

Feature fixed on v2.4:
  * correctly retrieve account information when it was already registred (afb7e988)
  * when DNS Host configuration is an IP address, use it correctly as name server (2776348a)
  * improve code stability by following hints from [pyright](https://github.com/microsoft/pyright)
    (raises more explicit errors, fix function return type...)

Continuous Integration:
  * Remove tests for Debian Jessie and add tests for Debian Bullseye (a745e655)
  * Validate all tests with the [pebble](https://github.com/letsencrypt/pebble) tiny ACME server

Documentation:
  * Move documentation from wiki to [`/documentations`](./documentations) directory so we can always synchronize it with code

Maintenance release v2.3

Feature fixed on v2.3:
  * fix compatibility with dnspython 2.0 (#11)
  * fix issue when trying to apply DNS update on secondary server (thanks Sebastian Koechlin)
  * fix debug message when CNAME was not found
  * fix test chain assertion (a chain contains more than 1 certificate)

Feature added:
  * skip already validated authorization challenge

Continuous Integration improvement:
  * Debian Stretch tests were using Debian Jessie image
  * Enable Docker build uses [BUILDKIT](https://docs.docker.com/develop/develop-images/build_enhancements/)
    and the `overlay2` filesystem driver

Other:
  * the .gitignore file has been simplified

Some bug fixes, code style following pep8 and updated Continuous Integration stages

Compatibility with ACME v2 draft-16

This release is only compatible with Let's Encrypt V2 API which is based on the 9th draft of ACME RFC.

A bit of code rework to be more clear, simpler unit tests and support for Windows end of lines (not tested on this OS, feedbacks are welcome !)

* use Nonce received in latest ACME server response if available
* Added a script to implement account key rollover
* Moved aside the script used to delete account key

* Add tests to cover more code
* Clean a bit info messages
* Fix typos

Update README links

First release of acme-dns-tiny.