Changes

Note that this problem is not generally solvable. First, some types of redirects are not detectable as redirects, such as navigations done by JavaScript on the web page. Second, it is always possible to construct cases where it is not well-defined what the correct answer is. For example, different combinations of redirect destinations changing temporally, multiple pages redirecting to the same page, multiple levels of redirects, and annotations associated mean in some cases it is not well-defined what set of data should be shown for the page. As a result, the goal is to do something that catches reasonable cases of redirection, and doesn't give ansers answers that are clearly wrong.