unbound: add domain resolution control options

- Add domain_forward to permit designated domains to forward instead
  of recurse as listed in resolve.conf.auto from DHCP WAN client
- Update rebind_protection and add rebind_interface to protect IP6
  GLA locally just like RFC 1918 protection
- Rename trigger to trigger_interface with backwards compatability
- Update odhcpd script for efficiency handling many clients

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

net/unbound/files/defaults.sh

@@ -0,0 +1,43 @@
+#!/bin/sh
+##############################################################################
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# Copyright (C) 2016 Eric Luehrsen
+#
+##############################################################################
+
+UNBOUND_LIBDIR=/usr/lib/unbound
+UNBOUND_VARDIR=/var/lib/unbound
+
+UNBOUND_PIDFILE=/var/run/unbound.pid
+
+UNBOUND_SRV_CONF=$UNBOUND_VARDIR/unbound_srv.conf
+UNBOUND_EXT_CONF=$UNBOUND_VARDIR/unbound_ext.conf
+UNBOUND_DHCP_CONF=$UNBOUND_VARDIR/unbound_dhcp.conf
+UNBOUND_CONFFILE=$UNBOUND_VARDIR/unbound.conf
+
+UNBOUND_KEYFILE=$UNBOUND_VARDIR/root.key
+UNBOUND_HINTFILE=$UNBOUND_VARDIR/root.hints
+UNBOUND_TIMEFILE=$UNBOUND_VARDIR/hotplug.time
+
+UNBOUND_CTLKEY_FILE=$UNBOUND_VARDIR/unbound_control.key
+UNBOUND_CTLPEM_FILE=$UNBOUND_VARDIR/unbound_control.pem
+UNBOUND_SRVKEY_FILE=$UNBOUND_VARDIR/unbound_server.key
+UNBOUND_SRVPEM_FILE=$UNBOUND_VARDIR/unbound_server.pem
+
+##############################################################################
+
+UNBOUND_ANCHOR=/usr/sbin/unbound-anchor
+UNBOUND_CONTROL=/usr/sbin/unbound-control
+UNBOUND_CONTROL_CFG="$UNBOUND_CONTROL -c $UNBOUND_CONFFILE"
+
+##############################################################################
+