gpg: Add option --with-subkey-fingerprint.
* g10/gpg.c (oWithSubkeyFingerprint): New. (opts): Add --with-subkey-fingerprint[s]. (main): Set that option. * g10/options.h (struct opt): Add 'with_subkey_fingerprint'. * g10/keylist.c (list_keyblock_print): Print subkey fingerprint. (print_fingerprint): Tweak printing to use compact format if desirable.
- Signed-off-by: Werner Koch <wk@gnupg.org>