* Move acme.py to acme/__init__.py to prepare splitup.
* Began moving generic code out.
* Creating backends.
* Update unit tests.
* Move remaining new code out.
* Use new interface.
* Rewrite module init code.
* Add changelog.
* Add BackendException for crypto backend errors.
* Improve / uniformize ACME error reporting.
* Create ACMELegacyAccount for backwards compatibility.
* Split up ACMEAccount into ACMEClient and ACMEAccount.
* Move get_keyauthorization into module_utils.acme.challenges.
* Improve error handling.
* Move challenge and authorization handling code into module_utils.
* Add split_identifier helper.
* Move order code into module_utils.
* Move ACME v2 certificate handling code to module_utils.
* Fix/move ACME v1 certificate retrieval to module_utils as well.
* Refactor alternate chain handling code by splitting it up into simpler functions.
* Make chain matcher creation part of backend.
* Use B(...) instead of RST formatting (which does not work for options).
* Improve the documentation on acme_directory.
It now mentions the ACME v1 deprecation for Let's Encrypt,
and mentions that ZeroSSL works.
* Improve ACME module documentation.
* Update plugins/doc_fragments/acme.py
* acme_account: add support for External Account Binding.
* Add changelog fragment.
* Error if externalAccountRequired is set in ACME directory meta, but external account data is not provided.
* Validate that EAB key is Base64URL encoded.
* Improve documentation.
* Add padding to Base64 encoded key if necessary.
* Make account creation idempotent with ZeroSSL.
* Get rid of ansible.netcommon requirement by integrating module_utils/compat/ipaddress.py.
* Reorder imports.
* Update ignore.txt for plugins/module_utils/compat/ipaddress.py.
* Linting (flake8 / pep8).
* Remove accidentally commited test for ansible/ansible#66920.
Felix Fontein
Toshio Kuratomi
Ansible Core Team