* xs/maps/apache2_functions.map: Add function for ServerRec::loglevel
* xs/Apache2/ServerUtil/Apache2__ServerUtil.h: port ServerRec::loglevel to
  httpd-2.4


git-svn-id: https://svn.apache.org/repos/asf/perl/modperl/branches/httpd24@1448060 13f79535-47bb-0310-9956-ffa450edef68