add ?page=last for generic object_list with pagination

[patrick@…]

usecase: you want to link to the last page, but you don´t know how many pages there are. e.g, when you have comments paginated and you want to link to the last comment posted, you could use ?page=last

except (InvalidPage, ValueError):
    if page == 1 and allow_empty:
        object_list = []
+    elif page == 'last':
+        page = paginator._get_pages()
+        object_list = paginator.get_page(page - 1)
    else:
        raise Http404

sorry, but submitting a patch didn´t work the last time, so I just put the code in here.
the above code-snippet is for django.views.generic.list_detail.object_list from line 52.

[Simon G. <dev@…>]

This sounds like a good idea - but we'll need something in the docs about it. Can someone write up a patch that does Patrick's change, and adds a bit to the generic views docs?

[nick@…]

Refactored patch plus generic views documentation

[Russell Keith-Magee]

(In [6149]) Fixed #4919 -- Added 'last' marker on paginators. Thanks to patrick@… the idea, and nick@… for the patch and docs.