'Send the preamble common to all WebSockets connections.
This might go away in the future if WebSockets continue to diverge.'

def sendCommonPreamble(self):

    self.transport.writeSequence(['HTTP/1.1    101    FYI    I    am    not    a    webserver\r\n', 'Server:    TwistedWebSocketWrapper/1.0\r\n', ('Date:    %s\r\n' % datetimeToString()), 'Upgrade:    WebSocket\r\n', 'Connection:    Upgrade\r\n'])
