Set the mapping flag in packets when a full mapping has been sent

[Himnish Hunma]

Check line 547 in TCPSendSock, where the mapping flag in the MPTransport data packet should be set depending if the dsn has a discontinuity right after the current dsn being sent.

public void sendData() {
        int newPayloadSize = getPayloadSize();
        while (newPayloadSize > 0) {
            // read through the databuffer index looking for incongruity

            // prepare the byte buffer
            byte[] payloadBuffer = new byte[newPayloadSize];
            int dataAck = dataBuffer.getSendMax();
            int payloadWritten = dataBuffer.read(payloadBuffer, 0, newPayloadSize);
            if (payloadWritten != newPayloadSize) {
                logError("Write failure: payloadWritten: " + payloadWritten + " payloadSize" + newPayloadSize);
            }

            // retransmission
            MPTransport dataTransport = new MPTransport(cID.srcPort, cID.destPort, MPTransport.DATA, 0, 0, dataAck, DSEQ, 0, 
                    payloadBuffer); //CHANGE mapping flag based on len

            // add to the queue once
            sendDataRT(dataTransport);
            newPayloadSize = getPayloadSize();
        }
        logOutput("Trying to send packet of 0 bytes");

    }