[apparmor] Let's enable AppArmor by default (why not?)

[intrigeri]

Wouter Verhelst:
> It would be awesome if you could also include some documentation in the
> style "I'm a Debian package maintainer and the apparmor profile for some
> of the binaries in one of my packages is buggy, how can I fix it?"
> or "I'm a Debian package maintainer and I'd like to write an
> apparmor profile for one of the binaries in my package, where do
> I start".

Some of this doc has been written by Ulrike Uhlig a few years ago:
https://wiki.debian.org/AppArmor/Contribute#Ship_an_AppArmor_profile_in_.22your.22_package

Cheers,
-- 
intrigeri