RTP timestamp & seq number editing during loops

[aturner]

I noticed that when loop mode is used the rtp timestamp and sequence number simply track the pcap file. Is there any option for loop mode that forces the timestamp and sequence number to increment even though tcpreplay has restarted to the beginning of the pcap file. If no, is there any chance this could be considered as a future option. I would be willing to contribute to the project if required since I feel this is an important feature for testing.

This will require application layer plugin architecture for libtcpedit.