dl.rustlang.org/ should point to rustlang.org

If I click Tutorial or any of the other doc links, and then clear the rest of the URL to go back to the frontpage, I also have to clear the dl. portion that is added. This doubles the amount of time it takes to get back to the front page.

It's hosted on s3 and not terribly easy to convince to redirect. Given that the back button gets you back to the referring page pretty easily, this doesn't feel like it's worth fussing over to me. Closing as wontfix.