gpg: Print the signer's UID during verification.
* g10/parse-packet.c (parse_signature): Sanitize the value stored in SIGNERS_UID. * g10/mainproc.c (issuer_fpr_string): New. (check_sig_and_print): Print the signers' UID. Print the issuer fingerprint in --rfc4880bis mode.
- Signed-off-by: Werner Koch <wk@gnupg.org>