tylerhunt/rack-canonical-host — pull request #20 by mozz100 (2014-05-12 15:15:56+00:00)
Title: Enable querystring manipulation via :query_values option.

I'm moving a site from one URL to another, and I'd like to let my users know when they've been automatically redirected using the gem.

This mod allows the use of a :query_values option - the browser gets redirected to a URL that preserves the original querystring (if any), but includes any specified in the option.