Unbound: Add hotplug/ntp script to request restart

-DNSSEC needs time, time needs ntp, or power off RTC
-Many consumer routers are cost thrifted without RTC
-Conf "val-override-date: -1" disables time inside DNSSEC
-Need restart as option is not dynamically switchable
-hotplug/ntp is used to set file /var/lib/unbound/unbound.time
-UCI will add or remove option depending on flag-like-file

Signed-off-by: Eric Luehrsen <ericluehrsen@hotmail.com>

net/unbound/files/unbound.ntpd

@@ -0,0 +1,28 @@
+#!/bin/sh
+##############################################################################
+#
+# Copyright (C) 2016 Eric Luehrsen
+#
+##############################################################################
+#
+# "Restart" Unbound on hotplug NTP ready:
+# - Only do this the first time when no file exists
+# - Some of Unbound conf options to not reload run time
+# - Change the enable flag for DNSSEC date-time checking
+#
+##############################################################################
+
+# Common file location definitions
+. /usr/lib/unbound/unbound.sh
+
+##############################################################################
+
+if [ "$ACTION" = stratum -a ! -f "$UNBOUND_TIMEFILE" ] \
+  && /etc/init.d/dnsmasq enabled ; then
+  #
+  echo "ntpd: $( date )" > $UNBOUND_TIMEFILE
+  /etc/init.d/unbound restart
+fi
+
+##############################################################################
+