SEO Add Yandex Bot to prevent duplicate pages in search results
 

Please add support for russian search engine Yandex (about 60% users in Russia use this search engine). More details http://help.yandex.com/search/?id=1112030
Yandex bot does not support cookies and VBulletin adds &s=SESSION_HASH to urls and as a result each time bot starts to index forum it gets more and more copies of the same pages which is very bad for SEO.

includes/init.php
Code:
$show['search_engine'] = ($vbulletin->superglobal_size['_COOKIE'] == 0 AND preg_match("#(yandex|google|msnbot|yahoo! slurp)#si", $_SERVER['HTTP_USER_AGENT']));
includes/xml/spiders_vbulletin.xml
Code:

Yandex Bot

Thanks.