Updated 1.6.2 release notes for release (and linkified tickets).
Bump version number for 1.6.2.
Bumped version number post-release.
[1.6.x] Fixed inaccuracies in generic mixins documentation.

Backport of a5391db76a20c8bb35a7bc0192870fddf747c54c from master.
[1.6.x] Added 1.6.3 release notes stub
[1.6.x] Fixed #21996 -- Used proper encoding for GeoIP content

Thanks Florent Messa for the report.
Backport of fb1e3435a4 from master.
[1.6.x] Reworked the detection of local storages for the collectstatic command.

Before 4befb30 the detection was broken because we used isinstance
against a LazyObject rather than against a Storage class. That commit
fixed it by looking directly at the object wrapped by LazyObject.
This could however be a problem to anyone who subclasses the
collectstatic management Command and directly supplies a Storage class.

Refs #21581.

Backport of 7e27885c6e7588471fd94a4def16b7081577bdfc from master.
[1.6.x] Added a missing import in staticfiles tests.
[1.6.x] Fixed #21566 -- Fixed AttributeError when using bulk_create with ForeignObject.

Backport of bbc73e6a12 from master.
[1.6.x] Added 1.6.3 release note for refs #21566.

Backport of 865392c478 from master
[1.6.x] Fixed #22013 -- Documented difference between SERVER_EMAIL and DEFAULT_FROM_EMAIL.

Backport of 44814e78cc from master
[1.6.x] Fixed #22062 -- Corrected static files config for Apache >= 2.4

Backport of ffa238c3f7 from master
[1.6.x] Fixed #22093 -- Made Form.Meta.fields examples consistent.

Thanks david-schultz at gmx.net for the suggestion.

Backport of 821fc925f0 from master
Merge branch 'stable/1.6.x' into turbia/1.6.x
[1.6.x] Fixed #21643 -- repeated execution of qs with F() + timedelta

Thanks Tim Graham for review.