Add tool to profile multicast / broadcast performance

[wifiprintguy]

Wi-Fi uses "group addressed data frames" to convey Ethernet broadcast and multicast traffic and the IP traffic that uses these Ethernet frame types. Since IP network infrastructure protocols such as ARP, NDP, DHCP, mDNS, WS-Discovery and UPnP SSDP depend on these protocols frequently as a precursor to using unicast protocols, it seems to makes sense to include tools and heuristics to this suite that evaluate the performance of these protocol classes.

(As I'm not a Perl programmer and as I also have limited bandwidth, I don't have time to contribute something myself...)