Consider including bsdtar and cabextract, for winetricks
soldier doesn't include bsdtar (libarchive) or cabextract, which are apparently needed by winetricks.
We can include these at their Debian 10 versions, if Valve are OK with the licensing and installed-size implications.
Anything we add to SteamRT 2 'soldier' should also be added to the SteamRT 3 'sniper' prototype.