contao/core — pull request #7382 by ausi (2014-10-19 10:23:10+00:00)
Title: Fix async flag for TL_JAVASCRIPT

Currently the `async` flag doesn’t work correctly:

```php
$GLOBALS['TL_JAVASCRIPT'][] = 'script.js|async';
// Output:

$GLOBALS['TL_JAVASCRIPT'][] = 'script.js|static|async';
// Output:
```

After the fix:

```php
$GLOBALS['TL_JAVASCRIPT'][] = 'script.js|async';
// Output:

$GLOBALS['TL_JAVASCRIPT'][] = 'script.js|static|async';
// Output:
```

Related: #7172