Move pk_encrypt into pkglue.c.
* src/x509.c (_ntbtls_x509_pk_encrypt): Renaming and move to... * src/pkglue.c (_ntbtls_pk_encrypt): Here. Use _ntbtls_x509_get_pk. * src/protocol-cli.c (write_encrypted_pms): Follow the rename.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>