It is correct but if you have two disimilar domain names then it will be a great help. For example we not only use
www.sitepointforums.com and sitepointforums.com but users can also access it through
www.sitepointforum.com and sitepointforum.com (note the singular form of forum). You can't handle this using the cookie options in vBulletin.
I will be using this, Thanks...