When stopping a chrooted named, unmount the devfs filesystem from

the chroot area. This stops "umount -a" failing when dropping to
single user.

Reviewed by:	dougb@

etc/rc.d/named

@@ -14,6 +14,7 @@ name="named"
 rcvar=`set_rcvar`
 start_precmd="named_precmd"
 start_postcmd="make_symlinks"
+stop_postcmd="named_poststop"
 required_dirs="$named_chrootdir"	# if it is set, it must exist
 extra_commands="reload"
 
@@ -81,6 +82,13 @@ make_symlinks()
 	ln -fs "${named_chrootdir}${pidfile}" ${pidfile}
 }
 
+named_poststop()
+{
+	if [ -n "${named_chrootdir}"  -a -c ${named_chrootdir}/dev/null ]; then
+		umount ${named_chrootdir}/dev 2>/dev/null || true
+	fi
+}
+
 named_precmd()
 {
 	local confgen_chroot