Thanks Odd_Bloke for the report.

Moved logic to syncdb command for backwards compatibility.

Credits for the initial patch go to ejucovy;
big thanks to Tim Graham for the review.

It prevented the GZipMiddleware from compressing some data types even on
more recent version of IE where the corresponding bug was fixed.

Thanks Aaron Cannon for the report and Tim Graham for the review.

This is achieved by inserting a fake entry in connection.queries when
not releasing a savepoint (since Oracle doesn't support that operation.)

Also removed the can_release_savepoints feature that was recently added,
but is superseded by this solution.

Turned it from a tri-valued boolean into a regular boolean.

Since `serialize` was backported to 1.7, it should appear before `keepdb`.

Fixes #19905 again.

Refs #19973.

Prevented clashes in the app registry.

Fixed #22790. Thanks timo for the report.

Refs #16723.

No test because this code is already deprecated (part of FastCGI support).

Stopped using the imp module on Python >= 3.3. Refs #21628.

Thanks guettli for the report.