mozilla/bedrock — pull request #551 by Osmose (2012-12-21 18:10:34+00:00)
Title: Fix Bug 823908: Preserve locale for tabzilla redirects.

- Ensures that if a locale is used with the old tabzilla URL it will
keep that locale through the redirect.
- Fixes a test that assumed the en-US locale was activated (and broke
as a result of the tabzilla test activating a different one).