gpg: Add option to print fingerprints in ICAO spelling.
* g10/gpg.c: Add option --with-icao-spelling. * g10/options.h (struct opt): Add with_icao_spelling. * g10/keylist.c (print_icao_hexdigit): New. (print_fingerprint): Print ICAO spelling.
- Signed-off-by: Werner Koch <wk@gnupg.org>