Raise a machine's network from what its engine says, once (hq ADR 0241)

A VPN client rewrote the laptop's resolver file and nothing said so. The
engine now states its machine's networking; the controller keeps it with
the machine's health (migration 0077) and raises the rewrite as its own
finding naming the writer, the machine's own faults as machine.<m>.network,
and what several machines cannot reach once, there. The gate waits on a
rewrite it did not make rather than putting back a good build.

cmd/mesh-controller/nodes.go

@@ -546,6 +546,9 @@ func showNode(ctx context.Context, inv *inventory.Inventory, name string) error
 		for _, line := range healthLines(h, had, time.Now()) {
 			fmt.Println(line)
 		}
+		for _, line := range networkLines(h, had, time.Now()) {
+			fmt.Println(line)
+		}
 	}
 
 	held, err := inv.Profile(ctx, name)