Refs #22632. Thanks Tim Graham for the review.

Refs #22632. Thanks Tim Graham for the review.

Restored original fix that had to be removed because the old djangoproject
server was still using Python 2.6.

Forward port of 46393980 from stable/1.7.x

Thanks Keryn Knight for the idea.

Thanks to apollo13 for suggested wording.

Refs #23073 Workaround.

Refs #22738 Repeats the mysql "offense". When the issue is solved, the
Oracle special case should be made to play with the solution (that is,
Oracle should be fixed the same way that mysql and the 3rd-party backneds
are).

This is a security fix. Disclosure following shortly.

This is a security fix. Disclosure following shortly.

This is a security fix. Disclosure following shortly.

This is a security fix. Disclosure following shortly.

Forward port of 49280a73 from stable/1.7.x

Transifex doesn't have zh_Hans/zh_Hant locales.
Forward port of c586fcd4 from stable/1.7.x

Thanks to Simon Charette, Aymeric Augustin, and Tim Graham
for reviews and contributions.