Channels connection setup.
    Register the current client on the related Group according to the language

def ws_connect(message):
    """
    Channels connection setup.
    Register the current client on the related Group according to the language
    """
    prefix, language = message['path'].strip('/').split('/')
    gr = Group('knocker-{0}'.format(language))
    gr.add(message.reply_channel)
    message.channel_session['knocker'] = language
    message.reply_channel.send({"accept": True})