Setup mailman3 server

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

Ref #59 (closed)

---

Migrated lists:

• arch-announce
• arch-devops-private
• arch-events
• arch-wiki-admins

roles/mailman3/tasks/main.yml

@@ -50,23 +50,11 @@
   tags:
     - firewall
 
-# TODO: start uwsgi
-# TODO: hyperkittynginx.ini
-# TODO: hyperkitty databases
-# TODO: https://wiki.archlinux.org/title/Hyperkitty#Setup
-# hyperkitty: LNkWhuGD2hddryrTgbfGfIrzGTLNKMCw
-# remove python-django-debug-toolbar
-
 - name: start and enable mailman{.service,-*.timer}
   systemd: name={{ item }} enabled=yes daemon_reload=yes state=started
   loop:
     - mailman3.service
+    - mailman3-digests.timer
+    - mailman3-gatenews.timer
+    - mailman3-notify.timer
     - uwsgi@mailman\x2dweb.service
-#    - uwsgi@hyperkitty.service
-#    - mailman-senddigests.timer
-#    - mailman-nightlygzip.timer
-#    - mailman-mailpasswds.timer
-#    - mailman-gatenews.timer
-#    - mailman-disabled.timer
-#    - mailman-cullbadshunt.timer
-#    - mailman-checkdbs.timer