fixes #6717

introduced in https://github.com/yiisoft/yii2/commit/bf206efc66bc47b693271359e433679c1618189b

Fixes #6427: In case of invalid route web application now throws exception with "Page not found" instead of "Invalid Route"

Fixes #4395: Added `$checkAjax` parameter to `yii\web\Response::redirect()` to support default redirection behavior for AJAX/PJAX requests

Fixes #5480: Added defensive code to `yii\web\User::getIdentity()` to avoid potential infinite recursion

Fixes #4889: Application was getting into redirect loop when user wasn't allowed accessing login page. Now shows 403

close #5762

Fixes #5587: `json_encode` is now used with `JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE` where it makes sense, also it is now default for `Json::encode()`

If you don't want to install command-line utils globally, you have to specify it's paths.

    public $commands = [
        'styl' => ['css', '@app/node_modules/bin/stylus < {from} > {to}'],
    ];

close #5130

Fixes #5001: `yii\rest\CreateAction`, `yii\rest\UpdateAction` and `yii\rest\DeleteAction` should throw 500 error if the model operation returns false without validation errors