Description
An url such as http://www.foo.com/ does not have a file name. The server might resolve it to http://www.foo.com/index.html,
index.asp or any other name. To avoid duplicates, Alkaline uses the MD5 hash algorithm for page contents, but it will
not be effective if the default page is dynamic. In such cases you may want to force the default name in order to
avoid duplicate results.
