[Libvir] RFC PATCH - Initial NodeGetCellsFreeMemory patch

[beth kon]

Here is my first pass at a patch for accessing the available memory 
associated with each NUMA cell through libvirt.

The initial framework patch provided by Daniel Veillard is a prereq of 
this patch:
https://www.redhat.com/archives/libvir-list/2007-September/msg00069.html

I have not yet tested this. I'm just distributing for comments.

A few comments/questions:
1) I think I got the versioning stuff right but that deserves a close look.
2) In Daniel's patch, libvirt.h and libvirt.h.in were identical. I 
assumed the patch would be before running autogen.sh, and only contain 
changes in libvirt.h.in, so that's how I did mine.  Let me know if I 
misunderstand something here.
3) I had to put #ifdef PROXY around calls to virXenErrorFunc in 
xenHypervisorNodeGetCellsFreeMemory to get this to build. I haven't 
figured out how the proxy code works so am not sure if this is the right 
approach.

-- 
Elizabeth Kon (Beth)
IBM Linux Technology Center
Open Hypervisor Team
email: eak at us.ibm.com

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