Add rebound rc.d script.

ok benno@ requested by tedu@

src/etc/Makefile

@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.414 2015/11/27 03:53:28 deraadt Exp $
+#	$OpenBSD: Makefile,v 1.415 2015/11/30 23:35:29 jturner Exp $
 
 TZDIR=		/usr/share/zoneinfo
 LOCALTIME=	Canada/Mountain
@@ -56,7 +56,7 @@ RCDAEMONS=amd apmd bgpd bootparamd cron dhcpd dhcrelay dvmrpd eigrpd ftpd \
 	ftpproxy ftpproxy6 hostapd hotplugd httpd identd ifstated \
 	iked inetd isakmpd iscsid ldapd ldattach ldomd ldpd lockd \
 	lpd mopd mountd mrouted nfsd npppd nsd ntpd ospf6d ospfd \
-	pflogd portmap radiusd rarpd rbootd relayd ripd route6d \
+	pflogd portmap radiusd rarpd rbootd rebound relayd ripd route6d \
 	rtadvd sasyncd sensorsd slowcgi smtpd sndiod snmpd spamd \
 	spamlogd sshd statd syslogd tftpd tftpproxy unbound \
 	watchdogd wsmoused xdm ypbind ypldap ypserv

src/etc/rc.d/rebound

@@ -0,0 +1,9 @@
+#!/bin/sh
+#
+# $OpenBSD: rebound,v 1.1 2015/11/30 23:35:30 jturner Exp $
+
+daemon="/usr/sbin/rebound"
+
+. /etc/rc.d/rc.subr
+
+rc_cmd $1