Trust the user when they say that their server name starts with 'https'
We have a long-standing bug where someone would configure Review Board to use

HTTPS only, but due to proxies or other methods, the HttpRequest wouldn't think

it was https. This meant that any URLs created by the Django resolvers would

start with 'http' instead of 'https'.
Because we know what the user configured their server name as, we can choose in

load_site_config() whether to set the 'HTTPS' environment variable or not. We

also need to set wsgi.url_scheme to 'https' in request.META for wsgi-based

clients.

Configured my devserver with a server name starting with "https" and fetched

the API root. Saw that all the links returned started with 'https'.