Add rcNG start/stop script.

Based on the patch provided with the PR, but the PREFIX is determined
at run time in the committed version.

PR:		ports/56176
Submitted by:	Kimura Fuyuki <fuyuki@nigredo.org>

dns/ez-ipupdate/Makefile

@@ -13,6 +13,7 @@ MASTER_SITES=	http://gusnet.cx/proj/ez-ipupdate/dist/
 MAINTAINER=	se@FreeBSD.org
 COMMENT=	Update your host name on any dynamic DNS service
 
+USE_RC_SUBR=	yes
 GNU_CONFIGURE=	yes
 
 post-install:
@@ -23,5 +24,6 @@ post-install:
 	done
 	${INSTALL_DATA} ${WRKSRC}/example.conf \
 			${PREFIX}/etc/ez-ipupdate.conf.sample
+	${INSTALL_SCRIPT} ${WRKDIR}/ez-ipupdate.sh ${PREFIX}/etc/rc.d
 
 .include <bsd.port.mk>

dns/ez-ipupdate/files/ez-ipupdate.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+#
+# $FreeBSD$
+#
+
+# PROVIDE: ez-ipupdate
+# REQUIRE:
+# BEFORE:
+# KEYWORD: FreeBSD shutdown
+
+# Add the following line to /etc/rc.conf to enable ez-ipupdate:
+#
+#ez_ipupdate_enable="YES"
+#
+
+. /etc/rc.subr
+
+if ! PREFIX=$(expr $0 : "\(/.*\)/etc/rc\.d/${0##*/}\$"); then
+    echo "$0: Cannot determine the PREFIX" >&2
+    exit 1
+fi
+
+name="ez_ipupdate"
+rcvar=`set_rcvar`
+command="$PREFIX/bin/ez-ipupdate"
+pidfile="/var/run/ez-ipupdate.pid"
+required_files="$PREFIX/etc/ez-ipupdate.conf"
+sig_stop="QUIT"
+
+ez_ipupdate_enable="NO"
+ez_ipupdate_flags="-c $PREFIX/etc/ez-ipupdate.conf -d -F $pidfile"
+
+load_rc_config $name
+run_rc_command "$1"

dns/ez-ipupdate/pkg-plist

@@ -1,5 +1,6 @@
 bin/ez-ipupdate
 etc/ez-ipupdate.conf.sample
+etc/rc.d/ez-ipupdate.sh
 share/examples/ez-ipupdate/example-dhs.conf
 share/examples/ez-ipupdate/example-dyndns.conf
 share/examples/ez-ipupdate/example-dyns.conf