[Libvir] Cleanup patch

Enclosed is a cleanup patch I applied, it corrects the XML api generation, fixes warning in the XSLT stylesheet, add comments to a number of internal functions, makes most function of the QEmu back-end static, fixes a few bugs found in the way. Daniel -- Red Hat Virtualization group http://redhat.com/virtualization/ Daniel Veillard | virtualization library http://libvirt.org/ veillard(a)redhat.com | libxml GNOME XML XSLT toolkit http://xmlsoft.org/ http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/