%0A may pass through.
* agent.h (server_control_s): New field USE_AUTH_CALL.
* call-scd.c (agent_card_pksign): Make use of it.
* command-ssh.c (data_sign): Set the flag.
(ssh_send_key_public): New arg OVERRIDE_COMMENT.
(card_key_available): Add new arg CARDSN.
(ssh_handler_request_identities): Use the card s/n as comment.
(sexp_key_extract): Use GCRYMPI_FMT_STD.
(data_sign): Ditto.
* learncard.c (make_shadow_info): Moved to ..
* protect.c (make_shadow_info): .. here. Return NULL on malloc
failure. Made global.
* agent.h: Add prototype.
* xasprintf.c (xtryasprintf): New.
* app-openpgp.c (get_public_key): Make sure not to return negative
numbers.
(do_sign): Allow passing of indata with algorithm prefix.
(do_auth): Allow OPENPGP.3 as an alternative ID.
* app.c (app_getattr): Return just the S/N but not the timestamp.
* no-libgcrypt.c (gcry_strdup): New.
