[libvirt] Dummy tag in xml desc?

[Jean-Michel Guillaume <guillauj gmail com>]

Hello Everybody!

I'd like to find a way to pass information between a machine & a virtual 
machine managed by libvirt (like we can with VirtualBox or VMware thanks 
to guest tools for instance ). I thought that I would have been able to 
write a comment section or something like that within the xml 
description of the right domain, but every new comments or xml tags are 
erased once I save them... Maybe somebody's got an idea to help me :D...

JMi