agent: More clean up of SSH support.
* common/util.h (get_pk_algo_from_key): New. * common/sexputil.c (get_pk_algo_from_key): The implementation. * agent/gpg-agent.c: Remove include of openpgpdefs.h. * agent/command-ssh.c (struct ssh_key_type_spec): Use integer ALGO. (ssh_key_types): Update with GCRY_PK_*. (make_cstring, sexp_extract_identifier): Remove. (sexp_key_construct): Use gcry_pk_algo_name to get ALGO string. (ssh_key_to_blob): Use cadr to get value list. (ssh_key_type_lookup): Lookup with integer ALGO. (ssh_receive_key): Follow the change of ssh_key_type_lookup. (ssh_send_key_public): Likewise. Use get_pk_algo_from_key to get ALGO.
This fixes the regresson introduced by the commit
894789c3299dc47a8c1ccaaa7070382f0fae0262.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>