Use Chromium's HSTS preload list

When opening http://tour.golang.org in e.g. simplebrowser, the website is almost empty, with various errors logged in the JS console:

When doing the same in Chromium, the site displays properly - note, however, that Chromium loads https://tour.golang.org even if the HTTP variant is opened explicitly.

What seems to happen here is that the HTTP version of the page sends a Strict-Transport-Security: max-age=31536000; preload header while still serving (broken) content via HTTP - the header causes Chromium to automatically redirect to HTTPS:

(Alternatively, this might actually happen because tour.golang.org is on the HSTS preload list which is not used by QtWebEngine?)