The use of predictable filenames in /tmp often leads to symlink attacks
so remove the most obvious use of them in the docs.

Backport of 77b8d8cb from master

Backport of 91cd4d8e from master

Backport of 32c7d93e from master

Backport of 5081adcb from master

Backport of 36d0aa43 from stable/1.9.x

This fixes a regression introduced by a5f6cbce.
Thanks Gavin Wahl for the report and Tim Graham for the review.
Backport of cd3c042b from master.

Backport of e0900707 from master

Thanks to Geoffrey Sechter and the Django NYC group for the report and Markus
for the review.

Backport of c4e372aa from master

Backport of ffcdb0b4 from master

Backport of a44dc200 from master

Thanks to Emanuele Palazzetti for the help.

Backport of 3a36c807 from master

The test creates and deletes a model in the same migration, and the model
had an AutoField. On Oracle, AutoField's are set up using deferred SQL, which
in this case was trying to modify a table after it had dbeen removed.

Backport of c8b3fbe2 from master

Referencing URLs by dotted path is a stronger convention than
importing the URLs.

Backport of 179fbab7 from master

Backport of 542b7f6c from master

Backport of 1aa8bf9b from master

Backport of ec708803 from master

Thanks Justin Abrahms for the report.

Backport of 166e0490 from master

Backport of 26c26e83 from master

Backport of e6bd688e from master

Backport of 64200c14 from stable/1.9.x

Backport of 34d88944 from master

Backport of e03798a4 from master

See https://github.com/sphinx-doc/sphinx/issues/2131

Backport of 0cfe589f from master

Backport of 88fc9e28 from master

Backport of a3708fda from master

Backport of 2cb50f93 from master

Backport of ec202eff from master

This is a security fix.

[1.8.x] Fixed #25767 -- Fixed data truncation possibility with Positive(Small)IntegerField on MySQL.

Backport of 710e11d0 from master

Backport of a918f8b0 from master

Backport of 8bce6fa6 from master

Backport of 97e1d243 from master