model in the trustdb version record. (tdbio_update_version_record): New
function to update version record values during a trustdb check or update.
(tdbio_dump_record): Show trust model in dump.
* trustdb.c (validate_keys): Call tdbio_update_version_record on success
so that the correct options are stored in the trustdb.
* options.h: rearrange trust models so that CLASSIC is 0 and OPENPGP is 1.
menu_addrevoker), keylist.c (list_keyblock_print, print_fingerprint): Show
"T" or the trust depth for trust signatures, and add spaces to some
strings to make room for it.
* packet.h, parse-packet.c (dump_sig_subpkt, parse_one_sig_subpkt,
parse_signature): Parse trust signature values.
* tdbio.h, tdbio.c (tdbio_read_record, tdbio_write_record): Reserve a byte
for the minimum ownertrust value (for use with trust signatures).
