scd: New flag --reread for LEARN
* scd/command.c (cmd_learn): Add flag --reread. * scd/app-common.h (struct app_ctx_s): New field need_reset. * scd/app.c (write_learn_status_core): Set need_reset if we notice an error after returning from a reread. Change all callers of card functions to return GPG_ERR_CARD_RESET so that that app is not anymore used.
- Signed-off-by: Werner Koch <email@example.com>