* sm/gpgsm.c (main): Add AES192 cipher. Allow SERPENT256.
--
Note that currently released Libcgrypt versions miss OIDs for Serpent
and thus Serpent can only be used with tye forthcoming Libgcrypt
1.7.1.
GnuPG-bug-id: 2273
Signed-off-by: Werner Koch <wk@gnupg.org>