[libvirt] [PATCH 0/7] refactoring network xml parsing + net-update additions

[Laine Stump]

Patches 1,2, and 4-7 refactor the network XML parsing functions to
have a more uniform calling sequence for different subelements of
<network>. This makes it simpler to write new virNetworkUpdate*()
backend functions for those bits (because they're then more similar to
existing functions.)

Patch 3 actually adds some new backends for updating subelements that
weren't previously implemented - <dns> host/srv/txt records.

The intent is to followup on patched 4-7 with backends for updating
<ip>, <forward>, and <bridge>; while I haven't gotten to those yet,
I'd rather get these changes in sooner than later, both for more
testing, and to make future backports simpler.