PHOENIX-MEDIA/Magento-PageCache-powered-by-Varnish — pull request #16 by Gibbs (2014-10-24 11:14:20+00:00)
Title: Add option to disable ESI over HTTPS.

I've added an option to disable the ESI form key being used when Magento is running over HTTPS. If a backend doesn't support ESI the output will break Magento. As Varnish doesn't support SSL I think this is a necessary feature.