PR: https://forum.opnsense.org/index.php?topic=3083.0

Plugins should be able to register new interfaces.
The basic idea is to materialize interface settings into the running config, so other services can utilize them in a uniform way.
Current hooks for legacy vpns, ipsec and openvpn should move into the same structure, which eliminates current static hooks.

The return content of the interface type itself needs to be further refined.

(trafficshaper) remove unused burst, in freebsd 10.2 it doesn't crash anymore, but doesn't appear to be very useful either. closes https://github.com/opnsense/core/issues/226

(interfaces.lib.inc) regression, parse "inet6 2001:470:xxx:xxx::2 --> 2001:470:xxx:xxx::1 prefixlen 128"

Nothing to gain from clustering too much.  The upside is that
we've got to clean up the settings for firewall, general and
misc considerably.

(firewall, nat) detect current configured address family, https://github.com/opnsense/core/issues/807

(firewall, nat) change default for none to empty, https://github.com/opnsense/core/commit/610013dcf37590350b7e41a32eaaccda08aa09ac#commitcomment-17585636

... the utmost potential to implode your setup.

Revert "(configd) send received output on script_output type when there is any, closes https://github.com/opnsense/core/issues/951"

This reverts commit b3049270.

(legacy) filter_log.inv move convert_real_interface_to_friendly_descr out of parse loop, https://github.com/opnsense/core/issues/672

(dnsmasq) add custom port option for domain overrides, closes https://github.com/opnsense/core/issues/799

(interfaces/dhcpv6 client) add debug option to advanced dhcpv6 client config, closes https://github.com/opnsense/core/issues/859

(firmware) move tooltip to button, apply tooltip for dynamic generated buttons. closes https://github.com/opnsense/core/issues/830