* py-bcrypt has not been updated in some time
* py-bcrypt does not support Python3
* py3k-bcrypt, a port of py-bcrypt to python3 is not compatible
  with Django
* bcrypt is supported on all versions of Python that Django
  supports

Fixed #20394 - Clarified argument of get_user in docs

Thanks ggbaker for the suggestion and Simeon Visser for the patch.

Fixed #20397 - Cleaned up issue with quotation marks in documentation

Thanks brandon@ and Anssi for the report.

Thanks bmispelon for the report and draft patch.

BCrypt on Python3

Excluded postgis specific gis tests from other spatial databases.

Refs #17365, #17366, #18727.

Refs #17365, #17366, #18727.

The origin statement "which could be ... or whatever" **misguides** many newbies like me.

In fact, the ``login`` function in ``contrib.auth`` stores ``user.pk`` in session, then ``get_user`` function in ``contrib.auth`` gets ``user.pk`` in session and then passes it to your custom ``get_user`` as ``user_id``.

Which means, ``user_id`` prarameter in your custom ``get_user`` has to be the primary key of ``User`` object, too.

Thanks to Preston Timmons for the bulk of the work on the patch, especially
updating Django's own test suite to comply with the requirements of the new
runner. Thanks also to Jannis Leidel and Mahdi Yusuf for earlier work on the
patch and the discovery runner.

Refs #11077, #17032, and #18670.

Added a test, the issue was already fixed (likely by the patch
for #19385).

Thanks Anssi for the review.

Thanks Julian Wachholz for the report.

This also updates all dependent functionality, including modelform_factory
 and modelformset_factory, and the generic views `ModelFormMixin`,
 `CreateView` and `UpdateView` which gain a new `fields` attribute.

connection.ops.spatial_version is None for some backends (eg. MySQL) and
the comparison fails on Python 3 with TypeError.

Remove unnecessary check on __set__ parameters.

Refs #19445

This test hits a bug in current ports of MySQLdb.

Current ports of MySQLdb are very buggy in this area.

Made a few minor compatibility adjustments.

Some tests failed when the time zone definitions were loaded in MySQL
and pytz wasn't installed. This setup isn't supported.

Thanks n0nam3 for the patch.