Add a who-can-upload tool?

Selected IRC log in lieu of a proper bug report:
15:30 < tumbleweed> Laney: do we need something in u-d-t to query packagesets? I found myself running edit_acl a lot during final freeze, to verify that I could sync something
15:31 < Laney> tumbleweed: maybe, don't know how often listing them is needed per se, rather than "can I upload x?"
15:31 < Laney> release team requirements are a bit specialised
15:31 < tumbleweed> maybe make syncpackage list the packagesets as well as the changelog?
15:32 < Laney> "is this seeded?" is the more important question?
15:32 < tumbleweed> yeah. But that's harder to determine...
15:33 < Laney> mmm
15:34 < tumbleweed> the sponsors page also equates packagesets with seeds
15:35 < cjwatson> "can I upload this?" is a sensible question something in u-d-t should be able to answer
15:35 < Laney> pretty sure it can
15:35 < cjwatson> possibly followed by "who can upload this?"
15:36 < tumbleweed> in freezes, there's also "I can upload this, but is it safe?"
15:36 < cjwatson> true
15:40 < Laney> I suppose listing (component, sets, seeded?) would be nice
15:42 < Laney> can you query LP to see if the archive is frozen?
15:43 < tumbleweed> looks like distro_series.status can tell us that
15:44 < Laney> could use that to enable some extra fear
15:44 < Laney> like a small electric shock
15:47 * cjwatson pro-forma objects again to exposing the "seeded" concept anywhere that humans might be expected to understand it
15:47 < Laney> but we already do expect people to understand it for freezes?
15:48 < Laney> or do you think /that/ is a mistake?
15:48 < cjwatson> yes, I do
15:48 < cjwatson> it's a hopelessly ambiguous term
15:49 < cjwatson> (a) actually listed in seed files (b) contained in the dependency-expansion of seeds (c) on some CD images (d) in some package sets ...
15:49 < cjwatson> we should say whatever we actually mean
15:51 < Laney> yes, I agree it needs defining. writing this code could actually prompt that...
15:51 < tumbleweed> cjwatson: the most useful thing for freezes is "on some CD images", is there any reasonable way to query that?
15:58 < cjwatson> tumbleweed: in practice it's probably best to grep the .list/.manifest files
15:58 < cjwatson> which is unfortunately not especially reasonable
15:58 < tumbleweed> that sounds out of the question for something we do regularly, but the way to go for a can-i-upload-this-during-freeze tool