[1.5.x] Fixed #19445 -- Skip admin fieldsets validation when the ModelAdmin.get_form() method is overridden.
Backport of 0694d2196f0fad
[1.5.x] Fixed #19333 -- Moved compress.py outside of the admin static folder. Thanks to camilonova, Russell Keith-Magee, Aymeric Augustin and Ramiro Morales for the feedback.
Backport of c9c40bc6bc64e6
[1.5.x] Fixed a typo in docs/topics/auth/customizing.txt

Backport of 2c173ff3b4 from master
[1.5.x] Fixed #19725 -- Made createsuperuser handle non-ascii prompts

Thanks Michisu for the report.
Backport of 55c585f1c from master.
[1.5.x] Updated translations (bn/es/eu/lb/mn)
[1.5.x] Fixed #19734 -- Missing values in `DATETIME_INPUT_FORMATS` doc.

Also changed formating of `DATE_INPUT_FORMATS` and
`TIME_INPUT_FORMATS` for readability.

Thanks minddust for the report!

Backport of 5c70299a71 from master.
[1.5.x] Fixed #19745 -- Forced resolution of verbose names in createsupersuser

Thanks Baptiste Mispelon for the report and Preston Holmes for the review.
Backport of 2390fe3f4 from master.
[1.5.x] Fixed #19743 - Documented some limitations of contrib.auth.

Thanks Aymeric for the suggestion.

Backport of afa3e16334 from master
Partially revert 9efe1a721, strip_tags improvements

The new regex seems not stable enough for being released. Stripping
with regex might need reevaluation for the next release.
Refs #19237.
[1.5.x] Fixed a typo in the test suite that was causing some spurious failures with pypy.
Backport of 6afc85af47f7d9f44
[1.5.x] Fixed #19756 - Corrected a ManyToMany example and added some links and markup.

Backport of 43efefae69 from master
[1.5.x] Fixed #19706 - Tweaks to the tutorial.

Thanks Daniele Procida.

Backport of aa85ccf8ce from master.
[1.5.x] Fixed #19772 -- Handled APPEND_SLASH correctly in the redirects app.

Backport of 64623a2.
[1.5.x] Fixed #19662 -- alter auth modelbackend to accept custom username fields

Thanks to Aymeric and Carl for the review.
[1.5.x] Fixed #19776 -- Added missing import for backport

line was present on master from 1520748dac95a7f114e4bb2feeee04d46c720494
[1.5.x] Fixed #19779 -- Checked contrib.sites presence in RedirectFallbackMiddleware

Thanks Aymeric Augustin for the report and directions for the patch.
Backport of 2ed90eac from master.
[1.5.x] Cleaned up some lingering signals in the test suite that were causing spurious failures with Pypy and Postgres.
Backport of db09a2de6e1bc7121
[1.5.x] Fixed #19749 -- Documented ending param to command's self.stdout/err

Thanks xian at mintchaos.com for the report.
Backport of 0201b9d6d from master
[1.5.x] Fixed #19699 - Removed "Please see the release notes" from versionadded/changed directives

Thanks Aymeric for the patch.

Backport of d93edffa89 from master.
[1.5.x] Made modwsgi groups_for_user consistent with check_password

2b5f848207b1dab35afd6f63d0107629c76d4d9a based its changes on #19061
that made the is_active attribute mandatory for user models.
The try/except was not removed for the groups_for_user function.

refs #19780