Support DAL version 8.0
    
    Provide stubs for backward compatibility.  DAL 8.0 was released with
    krb5-1.18, which is part of Fedora 32+.
    
    Signed-off-by: Robbie Harwood <rharwood@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>