It is cumbersome to manage the list configurations from the web ui and
easy for them to diverge, so let's instead manage them with Ansible.

Fix #254

Fixes: 26f289b7 ("Capitalize the first letter of all task names")

ansible-lint 6.5.0 complains about:

  name: All names should start with an
        uppercase letter. (name[casing])

These are used to signal the start of the document in a stream of many
documents. As Ansible only supports one YAML document per file this is
unnecessary. About a third of our YAML documents already lacked these.

It is run as part of the nntp runner now[1].

[1] https://gitlab.com/mailman/mailman/-/merge_requests/895

mailman-web has been packaged in the community repo and it uses
different paths than my homebrewed PKGBUILD.

We want to migrate to mailman3 as mailman2 is basically unmaintained and
requires Python 2 which is EOL.

Because the mailman and mailman3 packages conflict and we don't want to
perform a big bang migration, mailman3 must be deployed on a separate
server. mailman-web (mailman3's web interface) hasn't been packaged yet,
so for now we are using my homebrewed PKGBUILD[1].

[1] https://gist.github.com/klausenbusk/5982063f95c503754a51ed2fefb8915e

Ref #59