update signal handling

cmd/spoof-dpi/main.go

@@ -36,7 +36,15 @@ func main() {
 
 	sigs := make(chan os.Signal, 1)
 	done := make(chan bool, 1)
-    signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
+
+	signal.Notify(
+		sigs,
+		syscall.SIGKILL,
+		syscall.SIGINT,
+		syscall.SIGTERM,
+		syscall.SIGQUIT,
+		syscall.SIGCONT,
+		syscall.SIGHUP)
 
 	go func() {
 		_ = <-sigs