Pull up following revision(s) (requested by cegger in ticket #1599):
sys/arch/xen/xenbus/xenbus_probe.c: revision 1.31
previous fix does not work if there is exactly only one entry where continue
exits the loop.
Apply fix from Konrad Wilke on port-xen@
That makes NetBSD DomU boot on Linux Dom0 with xl.

(riz)