Since libvirt.h was split into multiple files and similarly
docs/libvirt-libvirt.html, docs/hvsupport.html have bad hyperlinks.  The
same happens for all the html.in files that used <code class='docref'>
tag, because page.xsl has no idea where to point the link that's found.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>