[libvirt] [PATCHv2 0/2] qemu: support live update of an interface's filter

[Laine Stump]

These two patches enable making a live change to the nwfilter of a
guest's interface via virDomainUpdateDeviceFlags (virsh
update-device).

Differences from V1:

1) add patch from Stefan Berger to do a proper comparison of the
   values stored in the filterparams hashtable.

2) simplify virNWFilterHashTableEqual to use Stefan's new function, and
   remove a couple of pointless comparisons based on Stefan's review.