gpg: Show AEAD preferences
* g10/packet.h (preftype_t): Add PREFTYPE_AEAD. * g10/keyedit.c (show_prefs): Print AEAD preferences. * g10/getkey.c (fixup_uidnode): Set AEAD flags. (merge_selfsigs): Ditto.
Although we are not able to create such keys we should be abale to
show them.
- Signed-off-by: Werner Koch <wk@gnupg.org>