tree.php

1. 增加可一次清除的目錄 Sapm，原先只有 Trash。

   [root@mail squirrelmail-1.4.8]# diff -uwN ./functions/tree.php /var/www/squirrelmail/functions/tree.php
   --- ./functions/tree.php	2006-04-15 06:27:08.000000000 +0800
   +++ /var/www/squirrelmail/functions/tree.php	2013-03-29 09:43:04.000000000 +0800
   @@ -78,8 +78,9 @@
     * @param array tree the tree to walk
     * @return void
     */
   -function walkTreeInPreOrderEmptyTrash($index, $imap_stream, $tree) {
   -    global $trash_folder;
   +function walkTreeInPreOrderEmptyTrash($index, $imap_stream, $tree, $purge_folder) { //dywang
   +	$trash_folder=$purge_folder; 
        if ($tree[$index]['doIHaveChildren']) {
            for ($j = 0; $j < count($tree[$index]['subNodes']); $j++) {
                walkTreeInPreOrderEmptyTrash($tree[$index]['subNodes'][$j], $imap_stream, $tree);