The "CloudFlare" already supports cPanel, you must integrate this plugin to cPanel first then RVskin will automatic support too.
Please follow the procedures below:
1. Download and setup "CloudFlare plugin for CPanel" , learn here: https://github.com/cloudflare/CloudFlare-CPanel
2. Enable cPanel Feature List in WHM (root) -> Packages -> Feature Manager. If you done it in correct way, you will see "CloudFlare" icon in cPanel users.
3. Register it to RVskin by using the command below:
# perl /root/rvadmin/autoupdatewhmaddon.pl
4. Enable RVskin Feature Package in WHM (root) -> Plugins -> RVglobalsoft Manager -> Theme Manager -> Feature Manager -> Package-Feature Manager.