Code review comment for lp:~vorlon/ubuntu-archive-tools/update-i386-whitelist

Hah, and when I said "all the places that hardcode i386", I guess the number of places is exactly one (the packageset), but my brain had somehow filled in that the URL argument had a default too, while it appears not to.

Other tooling in ubuntu-archive-tools is vaguely inconsistent on that front, to be fair, but either defaulting to a local file URL (assuming it'll run on snakefruit most often) or an https one (assuming it's more likely to be run remotely) might not be terribad. I dunno. The URL being in --help makes it a no-brained to copy-pasta, so whatevs.