AppArmor profile exchange

#include <tunables/global>
/usr/sbin/postgrey {
  #include <abstractions/base>
  #include <abstractions/nameservice>
  #include <abstractions/perl>

  capability chown,
  capability setgid,
  capability setuid,

  /etc/postgrey/* r,
  /usr/bin/perl ix,
  /usr/lib/** mr,
  /usr/sbin/postgrey mr,
  /usr/share/perl/** r,
  /usr/share/perl5/** r,
  /var/lib/postgrey/ r,
  /var/lib/postgrey/* krw,
  /var/run/postgrey.pid w,
}