itself. When that's set, in inviter UI add a button that adds own
relayID to the list (gross!, but how that whole thing works is TBD),
and when receiving invitation don't drop it if there's already a game
with the same ID.
works between linux and Android clients. Required renaming so struct
names and names of fields within match in c and java code. The point
is to test this as the foundation of rematch: now you have to type in
a deviceID in order to invite, which clearly sucks for users. Either
that goes away, or it's replaced with something that scans existing
games and lists past opponents as possible invitees.
