Dovecot profile updates
See merge request apparmor/apparmor!90
Acked-by: John Johansen <john.johansen@canonical.com>
(cherry picked from commit 6b78daf25b)
36bdd6ea add dovecot/stats profile, and allow dovecot to run it
26a8b722 allow dovecot/auth to write /run/dovecot/old-stats-user