gpg: Extend TRUST_foo status lines with the trust model.
* g10/trustdb.h (TRUST_FLAG_TOFU_BASED): New. * g10/trustdb.c (trust_model_string): Lowercase the strings. Add arg "model" and change callers to call with OPT.TRUST_MODEL. * g10/tofu.c (tofu_wot_trust_combine): Set TRUST_FLAG_TOFU_BASED. * g10/pkclist.c (write_trust_status): New. (check_signatures_trust): Call new function.
- Signed-off-by: Werner Koch <wk@gnupg.org>