network-stack: fix RoutingTable so it isn't insanely greedy on subnet matches
network-stack: fix RoutingTable so it isn't insanely greedy on subnet matches

jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree