TLS and Dogtag HTTPS request logging improvements
    
    Pretty printing the TLS peer certificate to logs on every request
    introduces a lot of noise; do not log it (subject name, key usage
    and validity are still logged).
    
    Fix and tidy up some HTTP logging messages for Dogtag requests.
    
    Part of: https://fedorahosted.org/freeipa/ticket/5269
    
    Reviewed-By: Jan Cholasta <jcholast@redhat.com>