Is your feature request related to a problem? Please describe.
Some Varnish setups include a Control Key, WP Rocket is not compatible with it, resulting in non-syncronized cache layers.
Customers must manually clear Varnish cache using other plugins or solutions outside WP Rocket.
Describe the solution you’d like
Add compatibility with the Varnish Control Key so that Varnish cache is cleared with WP Rocket’s automatic and manual triggers.
Related ticket: https://secure.helpscout.net/conversation/1618566335/291652?folderId=2675957