`readymulti` message (server)

A message indicating that the custom room is about to start playing.

Format

(object):
- (integer) id: The id of this message.
- (string) command: Always "readymulti".
- (object) data:
  - (object) options:
    - Options includes all the data in game.options and unmodifiable config section in Room Config
    - (string) latencypreference: Unknown, only has been observed to be "high", but might be different for people with less ping.
  - (object[]) contexts:
    - (string) listenID: The event stream this data belongs to. This is the id of the user which sent the data concatenated with gameID.
    - (object) user:
      - (string) _id: The id of the user.
      - (string) username: The username of the user.
    - (object) handling: Handling of the user
    - (object) opts:
      - (integer) fulloffset: Unknown.
      - (integer) fullinterval: Unknown.
    - (boolean) alive: Always "true".
  - (string) gameID: The id of the current game.
  - (boolean) first: If the game is the first in the set or not.
  - (boolean) started: Always "false".
  - (integer) lastKickRun: A Unix timestamp. Meaning is unknowned. Observed as 0 when not spectating?
  - (unknown?) board: Only currently observed to be null. Only appears when spectating.
  - (boolean?) midgamespectate: If you started spectating midgame? Only appears when spectating.

TODO: Needs more testing