[gollem] prevent user from accessing others files

[Per olof Ljungmark]

Hi,

What should be changed in this configuration to contain users in their
home directory without access to '/' ?

$backends['file'] = array(
    // Disabled by default
    'disabled' => false,
    'name' => 'Virtual Home Directories',
    'driver' => 'file',
    'hordeauth' => true,
    'params' => array(
        // The base location under which the user home directories live.
        'vfsroot' => '/usr/home/horde/vfs',
        // The default permissions to set for newly created folders and
files.
        'permissions' => '700'
    ),
    'loginparams' => array(),
    'root' => '/',
    'home' => $GLOBALS['registry']->getAuth(),
    // 'createhome' => false,
    // 'filter' => '^regex$',
    // 'quota' => false,
    'shares' => false,
    'attributes' => array(
        'type',
        'name',
        'share',
        'edit',
        'download',
        'modified',
        'size',
        'permission'
    )
);

Thank you,

//per
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