This is not related to anything, but I was getting "forever" updates
anytime I'd open Steamless, so I took a closer look. Turns out updates
aren't distributed through Steam at all: I have to launch the native
client from time to time for it to update itself, and I wasn't doing
that.

Anyway, I looked closer at the patch we do to the version service, and
it turns out there's two calls to it: one is from the current API_URL,
so the patch is meaningless, the other comes from the season menu item
putting that one's config into its structure. I have no idea what's that
for, but for the sake of not blindly thinking everything must be
`config.API_URL`, transform whatever menu item config into something the
proxy can use.