dns: Add neighbor-based hostname resolution to local server

adapter/neighbor.go

@@ -14,6 +14,7 @@ type NeighborEntry struct {
 type NeighborResolver interface {
 	LookupMAC(address netip.Addr) (net.HardwareAddr, bool)
 	LookupHostname(address netip.Addr) (string, bool)
+	LookupAddresses(hostname string) []netip.Addr
 	Start() error
 	Close() error
 }