Original patch by bkaluza. Tests and docs by humbertotm.

Regression in 917cc288.

Failure introduced in b6e48f51.

Regression in 3aa9ab39.

The exact metadata depends on the GDAL version.

Fixed #29416 -- Removed unnecesary subquery from GROUP BY clause on MySQL when using a RawSQL annotation.

Regression in 1d070d02.

Unused since d334f46b.

The docs contained a reference to the class
django.middleware.exception.ExceptionMiddleware. This class was introduced in
05c888ff. It was removed in 7d1b69db, but the documentation remained.

Reverted "Fixed #29324 -- Made Settings raise ImproperlyConfigured if SECRET_KEY is accessed and not set."

This reverts commit b3cffde5 due to
a regression and performance concerns.

Unused since 578711c3.

Thanks Ian Foote for finding this.

Regression in 620e9dd3.

Fixed #29414 -- Restored form inputs on admin inlines when the user doesn't have the change permission.

Regression in 825f0bed.

Fixed #29380 -- Added support for QuerySet.select_for_update()'s nowait and skip_locked options on MySQL 8+.