cupsd AppArmor profile fails to load on Stretch

Originally created by @intrigeri on #12116 (Redmine)

On feature/stretch-unfrozen:

Jan 07 08:37:46 localhost.localdomain systemd[1]: Starting AppArmor initialization...
Jan 07 08:38:05 amnesia apparmor[425]: Starting AppArmor profiles:profile has merged rule with conflicting x modifiers
Jan 07 08:38:05 amnesia apparmor[425]: ERROR processing regexs for profile /usr/sbin/cupsd, failed to load
Jan 07 08:38:07 amnesia apparmor[425]: profile has merged rule with conflicting x modifiers
Jan 07 08:38:07 amnesia apparmor[425]: ERROR processing regexs for profile /usr/sbin/cupsd, failed to load
Jan 07 08:38:07 amnesia apparmor[425]:  failed!
Jan 07 08:38:07 amnesia systemd[1]: apparmor.service: Main process exited, code=exited, status=123/n/a
Jan 07 08:38:07 amnesia systemd[1]: Failed to start AppArmor initialization.
Jan 07 08:38:07 amnesia systemd[1]: apparmor.service: Unit entered failed state.
Jan 07 08:38:07 amnesia systemd[1]: apparmor.service: Failed with result 'exit-code'.

Likely I’ve messed up the patch unfuzzying (after AppArmor policy was updated in Debian to support merged-/usr) or something.

Related issues

• Blocks #11831 (closed)