Seldaek/monolog — pull request #400 by holtkamp (2014-07-30 10:49:13+00:00)
Title: Added support for HTTP_X_FORWARDED_FOR and authenticated user for WebProcessor

The HTTP_X_FORWARDED_FOR entry is typically used when an application server is behind a proxy or a loadbalancer.
http://en.wikipedia.org/wiki/X-Forwarded-For