Added 1.6.4 release note stub.
Use the stdlib's compare_digest for constant time comparisons when available
Merge pull request #2600 from alex/builtin-constant-time-compare

Use the stdlib's compare_digest for constant time comparisons when available
Updated grammar in description of django.contrib.auth.
Various documentation typo/spelling fixes

Errors detected by Topy (https://github.com/intgr/topy), all changes
verified by hand.
Merge pull request #2602 from intgr/typofix

Various documentation typo/spelling fixes
Fixed #22486 -- Restored the ability to reverse views created using functools.partial.

Regression in 8b93b31487d6d3b0fcbbd0498991ea0db9088054.

Thanks rcoup for the report.
Used migration framework in GIS test tearDown
Added Spatialite support to the new migration framework

Refs #22451.