537 only tells the client's ui to start searching, the handshake after it was
missing: server sends 24106 StopHomeLogic, client answers 14105, server sends
21903. that last step now builds the same snapshot the npc mission does, using
npcs row 0 as the opponent.
battle type stays 1 so it runs on the client's offline path. a real pvp battle
is type 0 and needs the udp sector channel, which does not exist here.
14107 CancelMatchmake now answers 24125 instead of being ignored.
14303 AskForJoinableAlliancesList and 14107 CancelMatchmake are both genuinely
empty payloads. 516 UpdateLastShownLevelUp is header only, 537 StartMatchmake
carries a vint and a bool. none of them move the home checksum.
that clears the unknown type warnings out of the log.
