[libvirt] [PATCH] docs: remove reference to non-existent "igmp-ipv6" protocol

[Cole Robinson]

On 04/21/2016 02:36 PM, Laine Stump wrote:
> IGMP is used on IPv4 networks set setup multicast group

*to setup

> memberships. On IPv6, this job is done by Multicast Listener Discovery
> (MLD), which uses ICMPv6 packets rather than using its own IP protocol
> number.
> 
> The nwfilter documentation lists "igmp-ipv6" as one of the possible
> protocols, but this is ignored (and stripped from the xml). This patch
> removes that erroneous reference.
> 
> Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1038888

ACK

- Cole