Updated mediawiki/extensions
Project: mediawiki/extensions/ZeroRatedMobileAccess  5920c1629d9685e00b72dd21437d0be32977164d

Added 'Enable-ESI: 1' response header for varnish

When backend expects varnish to process ESI tags,
it will include the "Enable-ESI: 1" header in the response.

Change-Id: I32532b22a757b40d72b88f23e93a940d00d4c053