* scd/app-piv.c (struct genkey_result_s): new.
(struct app_local_s): add member genkey_results.
(do_deinit): Free that one.
(flush_cached_data): Extend to delete all items.
(keyref_from_dobj): New.
(do_readkey): New.
(do_auth): Use keyref_from_dobj.
(does_key_exist): New.
(genkey_parse_rsa): New.
(do_genkey): New.