Use has_leading_keyword in the assuan callbacks.
* agent/call-pinentry.c (inq_quality): Use has_leading_keyword. * agent/call-scd.c (inq_needpin, inq_writekey_parms): Ditto. * g10/call-agent.c (inq_writecert_parms, keyinfo_status_cb): Ditto. (inq_genkey_parms, inq_ciphertext_cb, inq_import_key_parms): Ditto. * g10/call-dirmngr.c (ks_put_inq_cb): Ditto. * sm/call-agent.c (default_inq_cb, inq_ciphertext_cb): Ditto. (inq_genkey_parms, istrusted_status_cb, learn_status_cb): Ditto. (keyinfo_status_cb, inq_import_key_parms): Ditto. * sm/call-dirmngr.c (inq_certificate, isvalid_status_cb): Ditto. (lookup_status_cb, run_command_inq_cb, run_command_status_cb): Ditto.