vtest "director fails to pick backend"

server s1 {
	rxreq
	txresp
} -start

vinyl v1 -vcl+backend {
	import vtc;

	sub vcl_recv {
		set req.backend_hint = vtc.no_backend();
	}
} -start

client c1 {
	txreq
	rxresp
	expect resp.status == 503
} -run
