How to exclude relative local links from nofollowing

Issue Summary

Hi,

First of all, thanks for this superb module. It works great with just one exception.
When I create local relative links such as:

<a href="/sites/default/files/scs/software/0001/0016/00_MS_Office_Home_and_Student_2007.gif">

they are being nofollowed by default. And there is no way I can whitelist this (I'm using whitelisting per default).

If you have a look at http://www.buybub.com/microsoft-office-home-and-student-2007
There is a bunch of locally linked files like the one above and all of them have nofollow attribute added by this module even though I typed www.buybub.com in the whitelist.

Could you please tell me how to avoid nofollowing in this case? Or maybe there is a small patch needed?

Thanks,
bb