Fixed #19092 -- Completed Lithuanian date/time formats

Thanks Tadas Dailyda for the report and the patch.
Fixed #19605 - Removed unused url imports from doc examples.

Thanks sergzach for the suggestion.
Clarified WizardView.get_form_prefix doc, refs #19024
Fixed #19614 -- Missing request argument in render call.

Thanks Dima Pravdin for the report.
Removed some uses of the deprecated assertEquals
Fixed a typo in the error reporting docs.
Fixed #19099 -- Split broken link emails out of common middleware.
Removed obsolete comment.

These features are implemented, tracked in tickets, or not necessary.

Thanks Bruno Renié.
Kill mx.TextTools with fire
Merge pull request #649 from mattrobenolt/patch-1

Removed untested optional dependency on mx libraries.
Fixed #19597 - Added some notes on jQuery in admin.

Thanks Daniele Procida.
Fixed #17008 -- Added makemessages option to not remove .pot files.

Thanks airstrike for the report and initial patch, Julien for an
enhanced patch and Jannis for reviewing.
Modified makemessages so it creates .pot files once per invocation.

It creates a `locale/django.pot` file once instead of one
`locale/<locale_code>/django.pot` file for every locale involved.

Thanks Michal Čihař for the report and patch.
Simplified i18n commands tests.
Made (make|compile)messages commands accept multiple locales at once.

Thanks Craig Blaszczyk for the initial patch. Refs #17181.
Avoided unnecessary recreation of RelatedObjects

Refs #19399. Thanks to Track alias KJ for the patch.
Removed models/related.py BoundRelatedObject

The class wasn't used anywhere except in RelatedObject.bind(), which
wasn't used anywhere. The class had one method defined as
NotImplemented, yet the class wasn't subclassed anywhere. In short, the
class was dead code.
Fixed #19632 -- Bug in code sample.

Thanks grossmanandy at bfusa com and Simon Charette.
Fixed #19628 - Noted that app for custom user model must be in INSTALLED_APPS

Thanks dpravdin and Jordan Messina.
Fixed #19606 -- Adjusted cx_Oracle unicode detection.