yiisoft/yii2 — pull request #2431 by maximal (2014-02-14 12:18:53+00:00)
Title: MIME for JSONP

It’s better to use `application/javascript` instead of `text/javascript`.

Also it could be `application/json-p` in future.

See:
* http://en.wikipedia.org/wiki/JSONP#Security_concerns
* http://stackoverflow.com/questions/3128062/is-this-safe-for-providing-jsonp/3128948#3128948