Sequence number variables shall be named 'seq_start' or 'seq_end'. TCPFlow will soon support streaming packets, not just a list, through an add(pkt) method.
Specifically, it was made into a free function, as was detect_handshake. A no-op detect_closing handshake has also been added
made TCPFlow stop printing 'returning first of 1 segments warnings' added debug packet count to TCPFlowAccumulator'
also, various cosmetic changes in tcpflow.py