enable gluon-ebtables-filter-ra-dhcp

This filters out address requests (DHCP v4/v6 and SLAAC) going to client
ports and address offers from client ports.

The existing config already allows running a DHCPd/radvd on the node
itself, so we don't need to change anything in the package.

site.mk

@@ -29,6 +29,7 @@ GLUON_SITE_PACKAGES := \
 	gluon-ffbsnext-info-pull \
 	usign \
 	-gluon-ebtables-limit-arp \
+	gluon-ebtables-filter-ra-dhcp \
 	gluon-status-page-mesh-batman-adv \
 	respondd \
 	respondd-module-airtime \
@@ -41,7 +42,6 @@ GLUON_SITE_PACKAGES := \
 
 #	gluon-ebtables-source-filter \
 #	gluon-ebtables-filter-multicast \
-#	gluon-ebtables-filter-ra-dhcp \
 #	gluon-alfred \
 #	gluon-mesh-vpn-fastd \