Wikia/app — pull request #2596 by macbre (2014-01-27 11:46:55+00:00)
Title: Varnish caching changes backported

Following PR backported to the current release:

* #2583 - Serve E-Tag along with Last-Modified header
* #2587 - move "served by" info to header
* #2595 - send CB value with beacon requests

@prein / @michalroszka / @Wikia/platform-team