[gollem] "change directory"

[Liam Hoekenga]

"Change directory" (both from the menu bar, and the drop down) seems to be
broken. (this is horde / gollem checked out this morning).

We need people to be able to get to parts of our vfsroot outside of their
home directories.  Relative links inside the current directory (eg
"Public/html"), and absolutely links to other parts of the vfsroot
("/user/l/i/liamr") both seem to broken.

Here's what our stanza in backends.php looks like:

$backends['file'] = array(
    'name' => 'IFS Home Directories',
    'driver' => 'file',
    'preferred' => '',
    'hordeauth' => true,
    'params' => array(
        // The base location of user home directories.
        'vfsroot' => '/afs/umich.edu/',
        // The name of the current user's home directory.
        'home' => 'user' . '/'
                . substr( Auth::getAuth(), 0, 1 ) . '/'
                . substr( Auth::getAuth(), 1, 1 ) . '/'
                . Auth::getAuth()
    ),
    'attributes' => array('type', 'name', 'download', 'modified', 'size', 'owner')
);

and here's what our vfsroot looks like...

    # ls /afs/umich.edu
    README  class  group  system  um  user

Our home directories are broken down into further subdirectories based on
the first two letters of the login name... eg..

    /afs/umich.edu/user/l/i/liamr

Any ideas / suggestions?

Liam