* agent/agent.h (agent_card_cardlist): Remove.
(agent_card_keyinfo): Add CAP argument.
* agent/call-scd.c (card_cardlist_cb): Remove.
(agent_card_cardlist): Remove.
(agent_card_keyinfo): Support CAP constraint.
* agent/command-ssh.c (card_key_list): Remove.
(ssh_handler_request_identities): Use SCD KEYINFO command.
* agent/command.c (cmd_keyinfo): Follow the API change.
* agent/divert-scd.c (ask_for_card): Likewise.