Being able to revert here means you made a backup of the configuration file or you put it under control of a file versioning system (that's what I do) prior to Doing Stuff. Taking that as your cue to devise a backup plan, download the httpd package and extract the etc/httpd/conf/httpd.conf in any compressed file extraction tool or File Manager that understands the RPM format or run it through 'rpm2cpio', example:
Code:
mkdir /tmp/httpd-2.2.15-15; cd $_; rpm2cpio httpd-2.2.15-15.el6.centos.1.i686.rpm | cpio -idmv