Adding support for the X-HTTP-Method-Override header

This reverts commit 80be824f.

This reverts commit b82a9b1c.

Fixes #1812: Hide potential warning message due to race condition occurring to `Session::regenerateID()` call

Fix url for db panel.

Fixture controller global fixtures option

Faker controller improved

Fixes #2298: Fixed the bug that Gii controller generator did not allow digit in the controller ID (qiangxue)

Fixes #2303: Fixed the bug that `yii\base\Theme::pathMap` did not support dynamic update with path aliases

controller improved

debug changelog

fixes #2254