ipv6 icmp on mesh

src/freedombone-utils-mesh

     iptables -A INPUT -p tcp --dport 8010 -j ACCEPT
 
 
-    ip6tables -A INPUT -p icmp --icmp-type echo-request -j ACCEPT
-    ip6tables -A OUTPUT -p icmp --icmp-type echo-reply -j ACCEPT
+    ip6tables -A INPUT -p ipv6-icmp -j ACCEPT
+    ip6tables -A OUTPUT -p ipv6-icmp -j ACCEPT
     ip6tables -A INPUT -p tcp --dport $TRACKER_PORT -j ACCEPT
     ip6tables -A INPUT -p udp --dport $TRACKER_PORT -j ACCEPT
     ip6tables -A INPUT -p udp --dport 6240 -j ACCEPT