IPv6 Neighbor Discovery Protocol (NDP) Proxy

WWW: https://github.com/monviech/ndp-proxy-go
DOC: https://docs.opnsense.org/manual/ndp-proxy-go.html

Plugin Changelog
================

1.3

* Add ratelimit for pfctl operations

1.2

* Add firewall alias support
* Add cache file support for faster recovery after system reboots

1.1

* Add experimental point-to-point device upstream support (e.g. PPPoE)

1.0

* Initial Release