SOCGame, SOCServer, SOCGameHandler: Misc javadocs game start, end, list-locks
SOCGameHandler.leaveGame: If observer leaves isBotsOnly game, keep the game going
SOCGameHandler.sendGameStateOVER: If game.isBotOnly, call srv.destroyGame which might call srv.startRobotOnlyGames. Checked, validated all current sendGameState callers vs this; javadocs