alphagov/pp-puppet — pull request #200 by robyoung (2014-01-02 12:38:13+00:00)
Title: Fix X-Forwarded-{Host,Server} in nginx configs

Allow the X-Forwarded-{Host,Server} headers to be created by appending
the current host to an incoming header. This is needed for backdrop
vhosts where there are multiple steps.