Fix `build_requestinfo` in LibreSSL environments
    
    `build_requestinfo` was broken in @ac6568dcf.
    In this case LibreSSL behavior is the same as OpenSSL < 1.1.x.
    Thus, an additional check for SSL implementation was added.
    
    Fixes: https://pagure.io/freeipa/issue/7937
    Signed-off-by: Stanislav Levin <slev@altlinux.org>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>