Thanks Anssi Kääriäinen for the idea and Simon Charette for the
review.

Thanks to jwa for the report.

Also fixed #22124 -- Expanded explanation of exactly what is going on in
as_sql() methods.

Thanks bendavis78 for the report.

This reverts commit 1562b989.

Thanks @apollo13 for the suggestion. Refs #17413.

Thanks Paul McMillan for the review.

Also took the opportunity to slightly refactor gettext options
so as to ease customization by subclassing the command.
Thanks Michal Čihař for the report and initial patch.

Added the following scripts:
* Lithuanian (thanks to petraszd for the patch)
* Serbian (thanks to offy)
* Azerbajani (thanks to Ali Ismayilov)

Fixed the following issues:
* In Polish character map, some uppercase letters were
  converted to a lowercase ascii equivalent.
* The letter Y with a diaeresis had a lowercase version but no uppercase.

The code was also simplified and cleaned up:
* Use of `var` statements everywhere
* Systematic use of semicolons
* Proper looping over arrays and objects.

Thanks to @oinopion for his help in getting the javascript
into proper shape.

Fixes #8561, #11035.

GenericRelation now supports an optional related_query_name argument.
Setting related_query_name adds a relation from the related object back to
the content type for filtering, ordering and other query operations.

Thanks to Loic Bistuer for spotting a couple of important issues in
his review.

Thanks to Loic Bistuer for review. Minor changes to error messages
done by committer.

Refs #21725.

3e25c8ac was an incomplete
merge of the pull request.

Thanks to @ramast for catching this.

Fixed URL resolving in the case where an outer regex includes an inner
regex and both regexes use positional parameters instead of named
groups, causing the outer regex's parameters to override the inner
regex's.

Modified the regex url resolver so that it will concatenates and then
normalizes, instead of normalizing and then concatenating.

Fixed #21893 -- ModelState didn't account for MTI parents inherited from abstract models.

This feature allows the default `TIMEOUT` Cache argument to be set to `None`,
so that cache instances can set a non-expiring key as the default,
instead of using the default value of 5 minutes.

Previously, this was possible only by passing `None` as an argument to
the set() method of objects of type `BaseCache` (and subtypes).

The original patch for custom prefetches didn't allow usage of custom
queryset for single valued relations (along ForeignKey or OneToOneKey).
Allowing these enables calling performance oriented queryset methods like
select_related or defer/only.

Thanks @akaariai and @timgraham for the reviews. Refs #17001.

Thanks django-issues at colons.co for the suggestion.

Thanks matt at schinckel.net for the suggestion.

Thanks Piotr Kasprzyk for help with the patch.

Allows custom behavior for setting initial form data in ModelAdmin.
By default, initial data is set via GET params. The new method allows
this behavior to be overridden.

Thanks egasimus for the suggestion.