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Bit torrent map downloads for CA downloader

client checks your maps folder (using spring itself - unitsync) and creates torrents for all new maps
client can be given user name to automatically download maps for game which you join
client can optionally download all currently hosted maps
client allows you to upload torrents to central server (only those which are new)
client allows you to download maps using torrents from central server (only those you dont have)
client is limited to 5 downloads at once (to not overload the client network)

server maintains list of "requests" - list of currently requested torrents - clients seed those requested torrents in turn
server maintains list of torrents - along with map hash and name
server maintains list of players who are currently in battles and maps of those battles
client stores torrents in spring/updater/torrents folder (named by map hash), incoming torrents in updater/incomaing and incoming map files in updater/incoming/maps
after map download is finished map is copied to spring but incoming copy is left there for seeding until you close program.