Slightly modified and commited to cvs. Thanks for the note!

It's seems that the Prefs/kolab.php file isn't any more sync with the 
ldap.php.



Somes params are missing when we try to call Prefs_ldap :

we must add in $params :

  'writedn' => 'searchdn',

and one is incorrect :

'uid' => array('mail', 'uid')

must be replaced by :

'uid' => 'mail';