determining the jailosid for "static" images like OPENVZ-STD. For
example:

	tb-set-hardware $n1 d710-vm
	tb-set-node-os $n1 OPENVZ-STD FEDORA15-64-OVZ-STD

The main point is that OPENVZ-STD is a placeholder with no associated
image. It exists to tell the mapper and osload what to do. This is
accomplished with nextosid. The new approach makes things consistent
with subos stuff.