Backport 4.0 ABI for AppArmor 3 in mantic

[Alex Murray]

To support the use of AppArmor policies that specify features like userns, add the new 4.0 ABI from upstream https://gitlab.com/apparmor/apparmor/-/merge_requests/1061.

Note this should not be enabled by default (as the existing AppArmor profiles have not been updated to account for this) but it will allow easier testing of profiles that want to support this new ABI.

Also note this ABI is identical to that provided by the kernel in mantic and lunar currently:

# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu Mantic Minotaur (development branch)
Release: 23.10
Codename: mantic
# uname -a
Linux sec-mantic-amd64 6.3.0-7-generic #7-Ubuntu SMP PREEMPT_DYNAMIC Thu Jun 8 16:02:30 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
# diff /etc/apparmor.d/abi/4.0 <(aa-features-abi -x)
# md5sum /etc/apparmor.d/abi/4.0 <(aa-features-abi -x)
f17b0a97806d733b5b884d8a1c2fea37 /etc/apparmor.d/abi/4.0
f17b0a97806d733b5b884d8a1c2fea37 /dev/fd/63

[Launchpad Janitor (janitor)]

This bug was fixed in the package apparmor - 3.0.8-1ubuntu4

---------------
apparmor (3.0.8-1ubuntu4) mantic; urgency=medium

  * Backport 4.0 ABI from upstream (LP: #2026227)
    - d/p/u/add-4.0-abi.patch

 -- Alex Murray <email address hidden> Thu, 06 Jul 2023 12:14:15 +0930