This is Varnish Cache, the high-performance HTTP accelerator. Documentation and additional information about Varnish is available on http://www.varnish-cache.org/ Technical questions about Varnish and this release should be addressed to <firstname.lastname@example.org>. Questions about commercial support and services related to Varnish should be addressed to <email@example.com>.
The branch varnish-3.0.3-unique_xids contains a minor patch to Varnish 3.0.3 to ensure that XIDs are unique. The feature is switched on with a command-line parameter.