Test site for tor circuits

Similar to the ".onion" test site we have, it would be useful to have a test site for our tor circuits. To be able to easily verify tor circuit behaviour. I imagine it would be a list of links to the following:

1. A site that redirects to another.
2. A site that uses an intermediate redirect back to the same domain.
3. A site that loads only local resources.
4. A site that loads a cross-domain image.
5. A site that loads a cross-domain page in an iframe.
6. A site that runs a cross-domain fetch.
7. A direct link to a remote image file.
8. A direct link to an SVG file (with and without remote content)
9. A direct link to a PDF (with remote content).
10. A site that only loads a plain HTML page (no favicon, or data: favicon).
11. A site with a long cache.
12. A data: URL.
13. A blob: URL.
14. A site that can be opened via an IP address, rather than a host name.
15. A site that can be opened in about:reader. For the data: and blob: schemes as well? For the IP address website as well.
16. An about:blank page created via open, made to fetch remote (cross-domain) content.
17. A site that uses alt-svc to a plain web page.
18. A site that uses alt-svc to an onion web page.
19. An onion site.
20. A .tor.onion site.

/cc @morgan @pierov @ma1