rc.newwanipv6 called regardless of REASON
The dhcp6c_wan_script.sh does not honor the REASON-Variable set by the dhcp6c process. Even though it is RENEW and the interface lease was renewed way ahead of the IP expiry, the newwanipv6 script is called causing filter reload and so on. I would expect that REASON environment-variable is evaluated and then checked if we have a RENEW (lease extended) or really a REBIND (lease expired and needed to get a new one, we lost the IP on the interface for some time in this case so calling newwanipv6 is fine in this case).
For me every filter-reload causes some UDP-Packetloss, so I am trying to get "useless" reloads down to a minimum.