[imp] Share Folders option not visible

[Per olof Ljungmark]

H4/IMP5

General Options/Share Folders is invisible, there are only "Personal 
Information" and "Saved Searches".

What steps must be taken to make this option visible?
Should they be by default?



// *** ACL Preferences ***

$prefGroups['acl'] = array(
     'column' => _("General"),
     'label' => _("Share Folders"),
     'desc' => _("Share your mail folders with other users."),
     'members' => array('aclmanagement')
);

// ACL preference management screen
$_prefs['aclmanagement'] = array(
     'type' => 'special'
);

// folder sharing preferences
$_prefs['acl'] = array(
     // set 'locked' => true to disable folder sharing
     'value' => ''
);