L{lineReceived}.  In raw data mode, each chunk of raw data becomes a
    callback to L{LineReceiver.rawDataReceived}.
    The L{setLineMode} and L{setRawMode} methods switch between the two modes.

    This is useful for line-oriented protocols such as IRC, HTTP, POP, etc.

    @cvar delimiter: The line-ending delimiter to use. By default this is
                     C{b'\r\n'}.
    @cvar MAX_LENGTH: The maximum length of a line to allow (If a
                      sent line is longer than this, the connection is dropped).
                      Default is 16384.
    r;