Common APIs such as virConnectOpen/Close and similar which are used by
the non-hypervisor drivers in libvirt are grouped together with
hypervisor drivers, which makes the table very wide.
Split them out into a separate group and clean up the list of hypervisor
drivers.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>