• New upstream enhancement release 1.7.21
• http://www.reviewboard.org/docs/releasenotes/reviewboard/1.7.21/
• New Features:
• Added support for GitLab servers.
• Added support for the Unfuddle service.
• Added support for publicly accessible Local Sites.
• Performance Improvements:
• Massively improved render time of large diffs.
• API Changes:
• Added new query parameters for filtering lists of repositories.
• Bug Fixes:
• Fixed issues verifying and accessing files for Subversion repositories on Beanstalk.
• Fixed issues accessing properties on Subversion repositories on some hosting providers that require authentication.
• The activity widget in the administration UI now shows data for the current day.
• Fixed issues where the activity widget could break, depending on the date range.
• Fixed a regression in error messages provided when setting up a GitHub repository.
• Fixed links in e-mails to file attachments stored on CDNs.
• Removed an unnecessary external image included in e-mails.
• Users no longer on a LocalSite will be excluded from any e-mails on review requests or reviews they were previously involved in.

Djblets: Fix error 500 issue in ReviewBoard when errors occur in registration (such as attempting to register a name already in use).