Multiplayer client relay bridge and match lobby menu: WebSocket bridge, match lobby page, order relay, confirmed turns, checksums, chat, abort/resume

lang/en.lang

@@ -606,6 +606,38 @@ owner.rival1 = held by Mossgrim, the green master
 owner.rival2 = held by Lady Nightwell, the blue master
 owner.rival3 = held by the yellow master
 net.desync = The match has diverged: this computer sees a different dungeon than the others.
+menu.multiplayer = Multiplayer
+net.title = Multiplayer matches
+net.status_offline = No relay connection.
+net.status_connecting = Connecting to the match relay...
+net.status_lobby = Lobby
+net.status_lobby_room = Match {0}
+net.status_playing = Playing match {0}
+net.status_closed = Match closed: {0}
+net.error = {0}
+net.rooms = Open matches
+net.no_rooms = No open matches.
+net.create = Create match
+net.join = Join
+net.join_hint = Match code
+net.seats = Seats
+net.turn = Turn {0}
+net.paused = paused
+net.missing = a side is missing
+net.ready = Ready
+net.unready = Not ready
+net.start = Start match
+net.resume = Resume
+net.abort = Abort
+net.leave = Leave
+net.chat = Chat
+net.send = Send
+net.you = you
+net.host = host
+net.side0 = Red
+net.side2 = Blue
+net.side3 = Green
+net.side4 = Yellow
 
 # rival masters (free game)
 newgame.difficulty = Opponents