gluon-next-node: fix ebtables interface name

package/gluon-next-node/generate/lib/gluon/ebtables/250-next-node

@@ -1,14 +1,14 @@
-rule FORWARD --logical-out br-freifunk -o bat0 -d @next_node.mac@ -j DROP
-rule OUTPUT --logical-out br-freifunk -o bat0 -d @next_node.mac@ -j DROP
-rule FORWARD --logical-out br-freifunk -o bat0 -s @next_node.mac@ -j DROP
-rule OUTPUT --logical-out br-freifunk -o bat0 -s @next_node.mac@ -j DROP
+rule FORWARD --logical-out br-client -o bat0 -d @next_node.mac@ -j DROP
+rule OUTPUT --logical-out br-client -o bat0 -d @next_node.mac@ -j DROP
+rule FORWARD --logical-out br-client -o bat0 -s @next_node.mac@ -j DROP
+rule OUTPUT --logical-out br-client -o bat0 -s @next_node.mac@ -j DROP
 
-rule FORWARD --logical-out br-freifunk -o bat0 -p IPv4 --ip-destination @next_node.ip4@ -j DROP
-rule OUTPUT --logical-out br-freifunk -o bat0 -p IPv4 --ip-destination @next_node.ip4@ -j DROP
-rule FORWARD --logical-out br-freifunk -o bat0 -p IPv4 --ip-source @next_node.ip4@ -j DROP
-rule OUTPUT --logical-out br-freifunk -o bat0 -p IPv4 --ip-source @next_node.ip4@ -j DROP
+rule FORWARD --logical-out br-client -o bat0 -p IPv4 --ip-destination @next_node.ip4@ -j DROP
+rule OUTPUT --logical-out br-client -o bat0 -p IPv4 --ip-destination @next_node.ip4@ -j DROP
+rule FORWARD --logical-out br-client -o bat0 -p IPv4 --ip-source @next_node.ip4@ -j DROP
+rule OUTPUT --logical-out br-client -o bat0 -p IPv4 --ip-source @next_node.ip4@ -j DROP
 
-rule FORWARD --logical-out br-freifunk -o bat0 -p IPv6 --ip6-destination @next_node.ip6@ -j DROP
-rule OUTPUT --logical-out br-freifunk -o bat0 -p IPv6 --ip6-destination @next_node.ip6@ -j DROP
-rule FORWARD --logical-out br-freifunk -o bat0 -p IPv6 --ip6-source @next_node.ip6@ -j DROP
-rule OUTPUT --logical-out br-freifunk -o bat0 -p IPv6 --ip6-source @next_node.ip6@ -j DROP
+rule FORWARD --logical-out br-client -o bat0 -p IPv6 --ip6-destination @next_node.ip6@ -j DROP
+rule OUTPUT --logical-out br-client -o bat0 -p IPv6 --ip6-destination @next_node.ip6@ -j DROP
+rule FORWARD --logical-out br-client -o bat0 -p IPv6 --ip6-source @next_node.ip6@ -j DROP
+rule OUTPUT --logical-out br-client -o bat0 -p IPv6 --ip6-source @next_node.ip6@ -j DROP