Since refs #21489, FormSet classes and factories are exposed on the
django.forms package.

Complement to 48548d1a.

Geometry objects have an srid property, so this addition makes the raster api
more similar to the geometries api.

Forwardport of 65bff161 from stable/1.8.x

It doesn't seem relevant for anyone upgrading to Django 1.10
and beyond.

Thanks Daniel Wiesmann for inspiration.

This reverts commit 71ebcb85.

Thanks Andrey Yakovlev for the initial patch.

10ace52a added some regex processing for each request with SCRIPT_URL set.
In a speed critical section, conditionally apply of the regex will save some
resources.

This is a relic of when the tests were stored in contrib.auth.tests.

The reverse() added in 50aa1a79
crashed on a custom user model.

The deprecation removal in 5e450c52
removed too much.

Forwardport of d27085b0 from stable/1.8.x

Renamed in e542e81b.

Command exits with non-zero status if changes without migrations exist.

Thanks Nick Pope for the initial patch.

Thanks gjanee@ucop.edu for the report and Tim Graham for the review.

Traceback (most recent call last):
  File "tests\admin_scripts\tests.py", line 646, in test_startapp_unicode_name
    content = f.read()
  File "lib\encodings\cp1252.py", line 23, in decode
    return codecs.charmap_decode(input,self.errors,decoding_table)[0]
UnicodeDecodeError: 'charmap' codec can't decode byte 0x81 in position 46: character maps to <undefined>

Fixes a regression from 2bd1bbc4. Thanks Daniel Wiesmann for the report
and Tim Graham for the review.