Thanks Tim Graham for the report and recommendations

This reverts commit 0ac13ecc.

Before 4befb301 the detection was broken because we used isinstance
against a LazyObject rather than against a Storage class. That commit
fixed it by looking directly at the object wrapped by LazyObject.
This could however be a problem to anyone who subclasses the
collectstatic management Command and directly supplies a Storage class.

Refs #21581.

When invoked as follows:

  $ python manage.py dumpdata blogapp blogapp.Tag

Django would throw a TypeError. This commit fixes the problem and provides
a test.

Refs #21049. Thanks quinox for the report.

ForeignKey or ManyToManyField attribute ``limit_choices_to`` can now
be a callable that returns either a ``Q`` object or a dict.

Thanks michael at actrix.gen.nz for the original suggestion.

Thanks Florent Messa for the report.

Thanks Anssi Kääriäinen for the suggestion.

Thanks Keryn Knight for the report.

Added an additional keyword argument ``form_dict`` to calls of
WizardView.done() implementations which allows easier access to validated
forms by their step name.

Allowed a message to be passed to assertQuerysetEqual to make it consistent with other assert methods.

The test fails on Windows when pytz is not installed.

Attempting to add() and remove() an object related by a 'through' model
now raises more descriptive AttributeErrors, in line with set and
create().

Hopefully fixes a test failure on Jenkins.

Replaced _parse_content_type with cgi.parse_header

Also they should only be raised if allow_syncdb does exist, not just if
allow_migrate does not.

Refs comments on 25084101

Report and original patch from jrief.

Thanks Keryn Knight for the report.

Thanks to John Giannelos for the initial patch.

Added searched_locations in finders module. Added verbosity flag level 2 on 'findstatic'
command that will output the directories on which it searched the relative paths.

Reported by ccurvey. Initial patch by Jonas Svensson and Vajrasky Kok.

Original patch by Vajrasky Kok. Reviewed by Florian Apolloner, Aymeric Augustin.