This commit doesn't contain any code changes; it's purely a refactoring.

Thanks to trac user adepue for the report and original patch.

Refs #21574

Thanks to Keryn Knight for the report.

Typo in 1.7 release notes

This reverts commit 07fe0bf3.
This was not working properly on system without geos library
installed.

Currently, if the authentication mechanism uses a custom HTTP header
and not REMOTE_USER, it is not easy to test. This commit modifies
remote user tests in order to make them more generic.

Small nitpicks. All column-related ALTER TABLE commands take an
exclusive table lock in PostgreSQL. The difference is that adding a
column without default doesn't cause a table rewrite, so the lock is
held only for a short time.

The time taken is more accurately proportional to table size, not row
count.

Moving notes for assertNumQueries next to the other changes to test infrastructure

All input is now coerced to text before being normalized.
This changes nothing under Python 2 but it allows bytes
to be passed to the function without a TypeError under Python3
(bytes are assumed to be utf-8 encoded text).

Thanks to trac user vajrasky for the report.

Do not fetch 'en' catalogs, neither files with translation stats
lower than 5%. Centralized resource filtering.

Refs https://code.djangoproject.com/ticket/21591
Thanks to track user merb for the report.

Current language is no longer saved to session by LocaleMiddleware
on  every response (the behavior introduced in #14825).
Instead language stored in session is reintroduced into new session
after logout.

Forward port of c558a43f to master.

Thanks to Aymeric Augustin for the review and Trac alias monkut for the report.

Thanks moritz.pfeiffer at alp-phone.ch for the report and
Tim Graham for the initial patch.