The GenericRelation refactoring removed GenericRelations from
model._meta.many_to_many. This had the side effect of disallowing
editable GenericRelations in ModelForms. Editable GenericRelations
aren't officially supported, but if we don't fix this we don't offer any
upgrade path for those who used the ability to set editable=True
in GenericRelation subclass.

Thanks to Trac alias joshcartme for the report and stephencmd and Loic
for working on this issue.

Also added some tests for HttpRequest.__repr__.
Note that the added tests don't actually catch the accidental code
removal (see ticket) but they do cover a codepath that wasn't tested
before.

Thanks to Tom Christie for the report and the original patch.

Thanks alasdair.

Unfortunately, escape sequences (\x.. or \u....) do not fit well
with the gettext toolchain. Falling back to using literal char,
even if visibility is not ideal.

As get_text_list is using translations, setup settings before
calling it.

Thanks oubiga for the suggestion.

Fixed typo and slightly improved error message when db is missing time zone definitions.

Thanks olof.bjarnason at gmail.com for the report.

Refs #21432.

Thanks Enrique Martínez for the report and @bmispelon for the tests.

Fixed #21439 -- Propagated get_user_model exception from get_user

Fixes #21439

Regression introduced by commit 97774429.

Thanks to trac username troygrosfield for the report and test case.

Also removed a sentence that was incorrect: raising a
`ValidationError` inside `Form.clean` doesn't clear the
`cleaned_data` attribute.

Thanks to loic84 and timograham for the review.

Fixed #21388 -- Corrected language code for Frisian

Exposing the level name (e.g. "info") makes it possible to prepend
something to the class name. For example, Twitter Bootstrap has
an alert-info class. This class can now be added to the message
using `class="alert-{{ message.level_tag }}".
Because the level_tag was on the end of the `tags` property, it
could not be used in this fashion when extra_tags were given.

Thanks Gregoire Astruc for the report and furins for the review.

Django also uses locales provided by apps, which also might change. Also when
i18n is disabled, there is no need for watching translation files.

Added description of MySQL Connector/Python

Thanks Bouke Haarsma for the report.

Replaced the custom, untested memoize with a similar decorator from Python's
3.2 stdlib. Although some minor performance degradation (see ticket), it is
expected that in the long run lru_cache will outperform memoize once it is
implemented in C.

Thanks to EvilDMP for the report and Baptiste Mispelon for the idea of
replacing memoize with lru_cache.

Reorganized the MySQLdb section into a "MySQL DB API Drivers" section that describes both MySQLdb and MySQL Connector/Python. Included description of the Django adaptors for these DB API drivers.

Corrected LANGUAGES documentation on how to translate language
names. Now using django.utils.translation.ugettext_lazy instead
of a dummy gettext() function.

Thanks to Salvatore for the report.

Filtering out static file requests in runserver has been judged
arbitrary and can hide some debugging-related activity.
Thanks Roy Smith for the report and Aymeric Augustin for the
review.

Thanks arjan at anymore.nl for the report.