Call for testers: NetBSD IGMPv2 merge

[Bruce M. Simpson]

Hi,

I have mostly merged NetBSD's IGMPv2 implementation with a few refinements.
This work is being funded by a secret santa. :-)

This code is easier to read (and thus maintain), and fixes a minor 
memory leak in the IPv4 stack. It is also a jumping off point for the 
IGMPv3 work. KAME patch sets up to date have been against NetBSD, though 
I don't intend to use their patches directly.

Patch against -CURRENT, URL: 
http://people.freebsd.org/~bms/dump/igmp-netbsd-sync.patch

I have not merged the change which suppresses host membership reports 
for the link-local multicast scope space 224.0.0.0/8, my concern is that 
this breaks IGMP snooping switches on immediately attached layer 2 
networks, even though this range is not globally routable. (*)

Testing and review much appreciated. If enough people are willing to 
soak test this code before 7.0 point release is branched then it might 
justify going in in time for 7.0.

Regards,
BMS
(*) That is not a typo - 224.0.0.0/8 *not* the whole Class D range 
224.0.0.0/4.