* passphrase.c (agent_get_passphrase): New args CUSTOM_PROMPT and
CUSTOM_DESCRIPTION. 	Changed all callers.
* app-openpgp.c (do_getattr, do_learn_status, do_setattr): Support
the new private DOs.
(do_change_pin): Add a "N" prefix to the strings so that the
callback can act accordingly for a new PIN.  Unfortunately this
breaks existing translations but I see no wother way to overvome
this.
* cardglue.c (learn_status_cb): Ditto.
(agent_release_card_info): Ditto.
(struct pin_cb_info_s): Removed and changed all users.
(pin_cb): Reworked.
* card-util.c (card_status): Print them
(card_edit): New command PRIVATEDO.
(change_private_do): New.