Require Django Evolution 0.6.9 or higher.
Lock down the uploaded files a bit in default Apache configs.

The generated Apache configs now set some defaults that limit what can
be done in the uploaded directories. It prevents a .htaccess from
overriding settings, prevents other modules like php from executing, and
also sets some file types to appear as plaintext so that the browser
won't render them.

This is not a complete solution for protection against malicious files.
Older versions of IE don't care what mimetypes we use and will sniff for
HTML files, for instance. It's really up to the administrator to do some
heightened security precautions, which will be outlined in a KB article
separately.
Relax markdown version requirement.

The minimum markdown version requirement for Python 2.7 is now 2.2.1,
which will make it easier for certain setups using older versions to
upgrade. This was an issue for OpenShift.

Reviewed at https://reviews.reviewboard.org/r/4359/
Add a X-ReviewRequest-Repository header to e-mails.

This adds a X-ReviewRequest-Repository header to all outgoing e-mails.
This can help assist in filtering of e-mails when dealing with many
different repositories on Review Board.

Based on https://reviews.reviewboard.org/r/4328/, but with the header
renamed.
Update the Recaptcha URLs for Google's new URLs.

Google updated the Recaptcha URLs to be hosted on google.com. While the
old HTTP URL still works (as a redirect), the old HTTPS URL doesn't seem
to be working.

We now make use of the new URLs.
Merge branch 'release-1.6.x' into release-1.7.x
Merge branch 'release-1.7.x'