cakephp/cakephp — pull request #2741 by ADmad (2014-01-30 11:46:59+00:00)
Title: Added regex support to Validation::mimeType().

Doing
```'image' => ['rule' => ['mimeType', '#image/*#']]```
is way more convenient than
```'image' => ['rule' => ['mimeType', ['image/gif', 'image/png', ...]]]```