Bug 18628: Pass the client_ip parameter in the JavaScript proxy as well.

  # Assumes WebRTC datachannel is connected.

  connectRelay: =>

    dbg 'Connecting to relay...'

    @relay = makeWebsocket @relayAddr

    # Get a remote IP address from the PeerConnection, if possible. Add it to

    # the WebSocket URL's query string if available.

    # MDN marks remoteDescription as "experimental". However the other two

    # options, currentRemoteDescription and pendingRemoteDescription, which

    # are not marked experimental, were undefined when I tried them in Firefox

    # 52.2.0.

    # https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/remoteDescription

    peer_ip = Parse.ipFromSDP(@pc.remoteDescription?.sdp)

    params = []

    if peer_ip?

      params.push(["client_ip", peer_ip])

    @relay = makeWebsocket @relayAddr, params

    @relay.label = 'websocket-relay'

    @relay.onopen = =>

      if @timer

  parts.join ''

makeWebsocket = (addr) ->

makeWebsocket = (addr, params) ->

  wsProtocol = if WSS_ENABLED then 'wss' else 'ws'

  url = buildUrl wsProtocol, addr.host, addr.port, '/'

  url = buildUrl wsProtocol, addr.host, addr.port, '/', params

  ws = new WebSocket url

  ###

  'User agents can use this as a hint for how to handle incoming binary data: if