To activate mod_jserv:

o Copy jserv.conf.default, jserv.properties.default and
  zone.properties.default in ${PREFIX}/etc/apache to jserv.conf,
  jserv.properties and zone.properties.
o Touch /var/log/jserv.log with write permission for owner of httpd.
o Add "Include etc/apache/jserv.conf" into httpd.conf to activate mod_jserv.