[PATCH 0/3] fix ipv6 support

[Josef Bacik]

These patches are on top of Michael Chang's bootp6 code (which we also really
need so it would be great if those could go in as well).  At Facebook we have
ipv6 only clusters that we need to be able to provision over the network.  The
current grub2 support for ipv6 is broken in a few ways.  The routing stuff
needed to be reworked to handle talking to an ipv6 router properly.  I tried to
not change the code too much in order to make sure I didn't regress the ipv4
support.

There is also a patch for the efinet driver, without it we are unable to do any
networking with our UEFI boxes.

I'd appreciate reviews on these patches, this is my first foray into grub2.
Facebook is going to be replacing ipxe with grub2 and so we are dedicated to
getting grub2 into shape in order to be used to do network based provisioning
well.  Thanks,

Josef