Changed all callers.
* cardglue.c (pin_cb): Use it here, so the machine interface can
tell whether the Admin PIN is requested.
* cardglue.c (agent_scd_checkpin): New.
* misc.c (openpgp_pk_algo_usage): Added AUTH usage.
* app-openpgp.c (check_against_given_fingerprint): New. Factored
out that code elsewhere.
(do_check_pin): New.
* card-util.c (card_edit): New command "passwd". Add logic to
check the PIN in advance.
(card_status): Add new args to return the serial number. Changed
all callers.
so that it can be used by getattr to update the structure.
(agent_scd_getattr): New.
* keylist.c (print_pubkey_info): Add FP arg for optional printing
to a stream. Changed all callers.
--change-pin. New options --ctapi-driver, --pcsc-driver and
--disable-ccid
* options.h (DBG_CARD_IO): New.
* cardglue.c, cardclue.h: Enhanced.
* card-util.c: New. Taken from current the gnupg 1.9 branch.
* app-common.h, app-openpgp.c, iso7816.c, iso7816.h, apdu.c
* apdu.h, ccid-driver.c, ccid-driver.h: New. Takem from the current
gnupg 1.9 branch withy minor changes to include directives.
* Makefile.am: Added these files.
