Set some transaction-related feature flags on SQLite.

Refs #22496.
Fixed #22515 -- Fixed the object_id of the LogEntry that's created after a user password change in the admin.

Thanks ross at servercode.co.uk for the report.
Fixed #22493 - Added warnings to raw() and extra() docs about SQL injection

Thanks Erik Romijn for the suggestion.
Fixed #22422 -- Moved information about the application loading process to refs/applications.txt.
Fixed #22504 -- Corrected domain terminology in security guide.

Thanks chris at chrullrich.net.
Fixed a confusing heading in applications docs.

Refs #22422.
Fixed #22517, "view prefix" still referenced in urlconf docs
Fixed #21166 -- Reset errors_occurred flag after commit and rollback.
Fixed #22507 -- Clarified nature of the sender argument of signals