certmap: add OpenSSL implementation The OpenSSL 1.1 API is used but there is a short macro block which should added the needed compatibility if and older OpenSSL version is used. Related to https://pagure.io/SSSD/sssd/issue/3050 Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

certmap: add placeholder for OpenSSL implementation Reviewed-by: Jakub Hrozek <jhrozek@redhat.com> Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>