gpg: Update --trusted-key to accept fingerprint as well as long key id.
* g10/trustdb.c (tdb_register_trusted_key): accept fingerprint as well as long key ID. * doc/gpg.texi: document that --trusted-key can accept a fingerprint.
Fixed uses or return and kept the old string to avoid breaking
- GnuPG-bug-id: T4855
- Signed-off-by: Werner Koch <email@example.com>