Changed one link in docs/url_dispatch.txt to use a relative link, as an…

Changed one link in docs/url_dispatch.txt to use a relative link, as an experiment to see whether it'll work

git-svn-id: http://code.djangoproject.com/svn/django/trunk@4358 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/url_dispatch.txt

@@ -286,7 +286,7 @@ With this in mind, the above example can be written more concisely as::
 Note that you don't put a trailing dot (``"."``) in the prefix. Django puts
 that in automatically.
 
-.. _Django overview: http://www.djangoproject.com/documentation/overview/
+.. _Django overview: ../overview/
 
 Multiple view prefixes
 ----------------------