* scd/app-piv.c (data_objects): Mark returned key as having a keypair.
(do_with_keygrip): Check against encrusage and not used one tag.
* tools/gpg-card.c (piv_keyref_is_retired): New.
(list_all_kinfo): Pretty print retired keys.
--
This allows to list all existing retired keys without using separate
readkey commands.