Run spamd-setup from within /etc/rc.d/spamd, and take $spamd_black

into consideration.
Diff from Maurice Janssen, thanks!
ok rpe@ giovanni@

src/etc/rc

@@ -1,4 +1,4 @@
-#	$OpenBSD: rc,v 1.408 2013/12/15 17:40:45 tedu Exp $
+#	$OpenBSD: rc,v 1.409 2013/12/17 09:19:45 halex Exp $
 
 # System startup script run by init on autoboot
 # or after single-user.
@@ -499,10 +499,6 @@ start_daemon rbootd mopd spamd spamlogd kdc kadmind kpasswdd
 start_daemon ipropd_master ipropd_slave sndiod
 echo '.'
 
-if [ X"${spamd_flags}" != X"NO" ]; then
-	/usr/libexec/spamd-setup -D
-fi
-
 # If rc.firstime exists, run it just once, and make sure it is deleted
 if [ -f /etc/rc.firsttime ]; then
 	mv /etc/rc.firsttime /etc/rc.firsttime.run

src/etc/rc.d/spamd

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# $OpenBSD: spamd,v 1.3 2013/09/13 14:50:56 okan Exp $
+# $OpenBSD: spamd,v 1.4 2013/12/17 09:19:45 halex Exp $
 
 daemon="/usr/libexec/spamd"
 
@@ -15,4 +15,12 @@ rc_pre() {
 	return 0
 }
 
+rc_start() {
+	${rcexec} "${daemon} ${daemon_flags} ${_bg}"
+	spamd_setup_flags="-D"
+	[ X"${spamd_black}" != X"NO" ] && \
+		spamd_setup_flags="-b ${spamd_setup_flags}"
+	rc_do rc_wait start && /usr/libexec/spamd-setup ${spamd_setup_flags}
+}
+
 rc_cmd $1