Add a pkg(8) repository configuration file for cdrom-based package

installation.

As part of the 'pkg-stage' target, copy the configuration file
to the 'packages/repos/' directory on the DVD filesystem.

MFC after:	3 days
X-MFC-Before:	-RC3
Sponsored by:	The FreeBSD Foundation

release/Makefile

@@ -225,7 +225,11 @@ pkg-stage:
 .if !defined(NOPKG) && exists(${.CURDIR}/${TARGET}/pkg-stage.conf)
 	sh ${.CURDIR}/scripts/pkg-stage.sh ${.CURDIR}/${TARGET}/pkg-stage.conf \
 		${REVISION}
+	mkdir -p ${.OBJDIR}/dvd/packages/repos/
+	cp ${.CURDIR}/scripts/FreeBSD_install_cdrom.conf \
+		${.OBJDIR}/dvd/packages/repos/
 .endif
+	touch ${.TARGET}
 
 cdrom: disc1.iso bootonly.iso
 dvdrom: dvd1.iso

release/scripts/FreeBSD_install_cdrom.conf

@@ -0,0 +1,12 @@
+#
+# $FreeBSD$
+#
+# The pkg(8) repository configuration file for the installation DVD.
+#
+
+FreeBSD_install_cdrom: {
+  url: "file:///dist/packages/${ABI}",
+  mirror_type: "none",
+  enabled: yes
+}
+