successful import.
* keydb.c (keydb_set_ephemeral): New.
(keydb_store_cert): New are ephemeral, changed all callers.
* keylist.c (list_external_cb): Store cert as ephemeral.
* export.c (gpgsm_export): Kludge to export epehmeral certificates.
* gpgsm.c (main): New command --list-external-keys.
storing it.
* certpath.c (gpgsm_basic_cert_check): New.
* keydb.c (keydb_store_cert): New.
* import.c (store_cert): Removed and change all caller to use
the new function.
* verify.c (store_cert): Ditto.
* certlist.c (gpgsm_add_to_certlist): Validate the path
* certpath.c (gpgsm_validate_path): Check the trust list.
* call-agent.c (gpgsm_agent_istrusted): New.