* Remove Ubuntu 16.04 (Xenial Xerus) from CI.
* Removing PyOpenSSL backend from everywhere but openssl_pkcs12.
* Remove PyOpenSSL support from module_utils that's not needed for openssl_pkcs12.
* Add changelog fragment.
* 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
Felix Fontein
Olivier Clavel
Ansible Core Team