create missing directory (at least on fresh ubuntu 12.04)
Merge branch 'patch-3' of github.com:smaftoul/varnish into smaftoul-patch-3

Conflicts:
	attributes/default.rb
Merge remote-tracking branch 'origin/platform-centos'
Add request start header

(ie. for new relic profiling of request queing)
(see https://newrelic.com/docs/features/request-queuing-and-tracking-front-end-time)