'Sends a 100 Continue response, used to signal to clients that further
processing will be performed.
@param streamID: The ID of the stream that needs the 100 Continue
response
@type streamID: L{int}'

def _send100Continue(self, streamID):

    headers = [(':status', '100')]
    self.conn.send_headers(headers=headers, stream_id=streamID)
    self.transport.write(self.conn.data_to_send())
