BTW: IMHO the whitelist stuff should be removed. I see no need to whitelist domains. We assume good faith, unlikely that a GWT user uploads tons of copyvios.
Users have to apply for the right and then they have to whitelist the domain, too complicated.
For example https://tools.wmflabs.org/
url2commons/ has no restriction at all (as far i know), at least not a domain whitelist.
--Steinsplitter