Comment 6 for bug 1806263

I understand the back and forth between the packages responsibility here.
In fact I was involved in a similar problem for ntp that was discussed here:

- https://bugs.launchpad.net/ubuntu/+source/ntp/+bug/1689585/comments/7
- https://bugs.launchpad.net/ubuntu/+source/ntp/+bug/1689585/comments/12

Bluntly applying the same to this case it would be a change to mariadb that would do something like
- https://bugs.launchpad.net/ubuntu/+source/ntp/+bug/1689585/comments/13

TL;DR:
- if anything it would be the job of dh_appamor
- for security reasons it is intentionally not unloaded
- conflicting packages (rare edge cases) should NOT fix it by unloading on remove/purge
- conflicting packages (rare edge cases) should fix it by unloading in pre-inst if needed