scd:p15: Make it code work again for D-Trust cards.
* scd/app-p15.c (select_and_read_binary): Allow to skip the select. (select_and_read_record): Return the statusword. Silence error message for SW_FILE_STRUCT. (select_ef_by_path): Fix selection with a home_DF. (read_first_record): Fallback to read_binary for CardOS and return info about this. (read_ef_prkdf): Use info from read_first_record to decide whether to use record or binary mode. (read_ef_pukdf): Ditto. (read_ef_aodf): Ditto. (read_ef_cdf): Ditto. New arg cdftype for diagnostics. (read_p15_info): Pass cdftype. * scd/apdu.h (SW_FILE_STRUCT): New. * scd/apdu.c (apdu_strerror): Map that one to a string. * scd/iso7816.c (map_sw): and to a gpg-error.