Remove odhcp6c.user hack

package/gluon-core/files/etc/odhcp6c.user

-for file in /lib/gluon/odhcp6c.d/*; do
-	[ ! -x $file ] || $file
-done

package/gluon-mesh-batman-adv/generate/lib/gluon/odhcp6c.d/010-mesh-batman-adv

-#!/bin/sh
-
-[ "$INTERFACE" = 'client' ] || exit 0
-
-mkdir -p /var/gluon/mesh-batman-adv
-
-for ns in $RDNSS $RA_DNS; do
-	for domain in @mesh_domains@; do
-		echo "server=/$domain/$ns"
-	done
-done > /var/gluon/mesh-batman-adv/dnsmasq.conf.$$
-
-if cmp -s /var/gluon/mesh-batman-adv/dnsmasq.conf.$$ /var/gluon/dnsmasq.d/mesh-batman-adv.conf; then
-	rm /var/gluon/mesh-batman-adv/dnsmasq.conf.$$
-	exit 0
-fi
-
-lock /var/gluon/mesh-batman-adv/dnsmasq.conf.lock
-mv -f /var/gluon/mesh-batman-adv/dnsmasq.conf.$$ /var/gluon/dnsmasq.d/mesh-batman-adv.conf
-/etc/init.d/dnsmasq restart
-lock -u /var/gluon/mesh-batman-adv/dnsmasq.conf.lock