$NetBSD: patch-Make.rules.in,v 1.3 2021/10/16 19:46:42 tm Exp $

Add pfilter objects.

--- Make.rules.in.orig	Mon Aug 30 00:22:56 2021
+++ Make.rules.in	Fri Oct 15 10:32:05 2021
@@ -114,3 +114,6 @@
 
 FTPWHO_OBJS=ftpwho.o scoreboard.o misc.o
 BUILD_FTPWHO_OBJS=utils/ftpwho.o utils/scoreboard.o utils/misc.o
+
+OBJS+= pfilter.o
+BUILD_OBJS+= src/pfilter.o