CDNClient: Cope with longer manifest descriptions for some depots
Some depots now have a dict like {"public": {"gid": GID, ...}, ...} where we would traditionally have seen a flat dict {"public": GID, ...}. Not all depots have this: at the time of writing,
1628350 "Steam Linux Runtime - Sniper" does, but
1391110 "Steam Linux Runtime - Soldier" does not. Presumably this is a change that is being rolled out gradually to let the Steam client give better estimates of the size of a depot.
Cope with either format, by retrieving the gid field if the nested dict is present.
Resolves: https://github.com/ValvePython/steam/issues/436
I made a fork that incorporates this PR as well as several other pending PRs in this repo. I don't really particularly want to be the new maintainer for this, but if I'm still using it I may as well.
https://github.com/solsticegamestudios/steam