add back sample spamd(8) rules, converted appropriately; ok henning@

src/etc/pf.conf

@@ -1,4 +1,4 @@
-#	$OpenBSD: pf.conf,v 1.45 2009/09/01 13:51:19 henning Exp $
+#	$OpenBSD: pf.conf,v 1.46 2009/09/01 14:45:32 todd Exp $
 #
 # See pf.conf(5) for syntax and examples; this sample ruleset uses
 # require-order to permit mixing of NAT/RDR and filter rules.
@@ -16,6 +16,14 @@ set skip on lo
 
 pass		# to establish keep-state
 
+# rules for spamd(8)
+#table <spamd-white> persist
+#table <nospamd> persist file "/etc/mail/nospamd"
+#pass on egress proto tcp from any to any port smtp rdr-to 127.0.0.1 port spamd
+#pass on egress proto tcp from <nospamd> to any port smtp
+#pass on egress proto tcp from <spamd-white> to any port smtp
+
+
 #block in quick from urpf-failed to any	# use with care
 
 # By default, do not permit remote connections to X11