cipher:kdf: Add X963KDF for use in CMS.
* src/gcrypt.h.in (gcry_kdf_algos): Add GCRY_KDF_X963_KDF. * cipher/kdf.c (x963_kdf_open, x963_kdf_compute): New. (x963_kdf_final, x963_kdf_close): New. (_gcry_kdf_open, _gcry_kdf_final, _gcry_kdf_close): Add support for GCRY_KDF_X963_KDF.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>