[libvirt] PATCH: Convert lots of code to new memory APIs

[Jim Meyering]

"Daniel P. Berrange" <berrange at redhat.com> wrote:
> This patch converts a large amount of the XML parsing/generating code in
> the Xen and QEMU drivers over to using the new memory APIs, so we can get
> OOM checking of it. In the process I've discovered and fixed a number of
> double-free's, and leaks

Nice work!

I've looked through the first half, and think that's enough to ACK the
whole thing.  It would have been good to point out double frees and leaks,
(or even put them in a separate patch) but probably not worth the cost
of doing it after the fact.