Triaged
-------
https://code.djangoproject.com/ticket/26456 - Document formfield_callback attribute in ModelForm (wontfix)
https://code.djangoproject.com/ticket/26463 - Allowing Callbacks/Handlers to be called on Cache entry Expiration (wontfix)
https://code.djangoproject.com/ticket/26459 - Allow providing DecimalField with a custom context (accepted)
https://code.djangoproject.com/ticket/26469 - FieldFile.open() does not properly set mode when opening file (duplicate)
https://code.djangoproject.com/ticket/26472 - allow model field level silencing of system checks (accepted)
https://code.djangoproject.com/ticket/26481 - Add a "strict mode" for defer()/only() (accepted)
https://code.djangoproject.com/ticket/26482 - pretty-print json in JSONField form field (wontfix)
https://code.djangoproject.com/ticket/26480 - Allow sensitive_variables() to preserve the signature of its decorated function (accepted)
Authored
--------
https://github.com/django/djangoproject.com/pull/655 - Fixed #647 -- Fixed djangoproject.com registration email by disabling HTML template.
Reviewed/committed
------------------
https://github.com/django/django/pull/6408 - Refs #21608 -- Fixed incorrect cache key in cache session backend's save().
https://github.com/django/django/pull/6400 - Fixed #26452 -- Loaded middleware on server start rather than on first request.
https://github.com/django/django/pull/5977 - Fixed #25850 -- Made migrate/makemigrations error on inconsistent history.
https://github.com/django/django/pull/6391 - Fixed #26201 -- Documented the consequences of rotating the CSRF token on login.
https://github.com/django/django/pull/6415 - Fixed #26462 -- Fixed Python 2 UnicodeEncodeError when warning about long cache keys.
https://github.com/django/django/pull/6412 - Fixed #26455 -- Allowed filtering and repairing invalid geometries.
https://github.com/django/django/pull/6406 - Fixed #25856 -- Added %B support to Date.strftime.
https://github.com/django/django/pull/6373 - Fixed #26037 -- Documented precedence of USE_X_FORWARDED_HOST/PORT settings.
https://github.com/django/django/pull/6386 - Fixed #26403 -- Removed translated content in "Invalid block tag" message.
https://github.com/django/django/pull/6423 - Fixed #26466 -- Added HTTP_REFERER decoding to i18n set_language() view.
https://github.com/django/django/pull/6435 - Fixed #26145 -- Made debug context processor return queries for all databases.
https://github.com/django/django/pull/6436 - Fixed #26479 -- Added 'is not' operator to the if tag.
https://github.com/django/django/pull/6376 - Fixed #25847 -- Made User.is_(anonymous|authenticated) properties.