persistent changes to dhcpdv6.conf

[kpwn]

I want to make persistent changes to the dhcpdv6 configuration (dhcpv6.conf) in order to execute my own hooks.
However when i edit the file "/var/dhcpd/etc/dhcpdv6.conf" my changes get overwritten by opnsense whenever the dhcpv6 service is restartet. How can i make my changes persistent?

[kpwn]

I found out to change /usr/local/etc/inc/plugins.inc.d/dhcpd.inc
i can change the config now...
sad that it seems there isnt any usefull documentation out there....