[ingo] vfs driver do not create path

[kc]

By default the vfs driver will not create path if it is not exist. Paths are 
not exist in a virtual host environment.

I have make change to vfs.php in info/lib/driver

mail dl # diff horde-webmail-1.0.1/ingo/lib/Driver/vfs.php 
../webmail/ingo/lib/Driver/vfs.php
83c83
<         $res = $vfs->writeData('', $this->_params['vfs_path'] . 
$this->_params['filename'], $script);
---
>         $res = $vfs->writeData($this->_params['vfs_path'], 
> $this->_params['filename'], $script, true);