new pcap format that stores device index<->name mapping

[borkmann]

Implement a new pcap format which, after pcap file hdr, stores a map of net device index<->name, so that this can be better analyzed on a different machine than using netsniff-ng pcap format.

[vkochan]

Then may be it is better to add support for pcap-ng format ?

[borkmann]

Yes, totally agree, pcap-ng support would be nice.