* scd/app-p15.c: Include openpgpdefs.h.
(struct prkdf_object_s): Add fields have_keytime and ecdh_kdf.
(read_p15_info): Set ecdh_kdf.
(keygrip_from_prkdf): Flag that we have the keytime.
(send_keypairinfo): Send the key time only if valid.
(send_key_fpr_line): New.
(send_key_fpr): New.
(do_getattr): Add KEY-FPR.