Fixed URL parsing so it's now properly giving 404 for URLs like `http://example.com//////site/about`

and 7ba6a063

when $_SERVER['HTTPS'] is "ON" it doesn't work well

- added example code for application components
- added missing short description

[ci skip]

Removed fallback from mb_parse_str to parse_str from Request::getRestParams since mb_ availability is Yii2 requirement

Added Controller::enableCsrfValidation to support turning on/off CSRF validation for particular actions.

added version, csrfVar and csrfToken to yii js module.