interfaces: add prefix range option for Kea dynamic PD
This extends the prefix ID selection to be able to reserve a
range of IDs in order to automatically hand them out via Kea.
The accepted value is between 1 and the end of the PD ID range
and also validates against other IDs and their ranges.
This approach differs from the old ISC DHCPv6 in that we can
make room for delegation to avoid later surprises. It might
force a user to reshuffle his ID range, but Kea wants a IA-NA
subnet that is within the pool reserved here.
Services: Kea DHCPv6: Always start the prefix watcher when DHCPv6 is enabled. A reservation with a prefix but without a configured pd_pool is also valid, it's more pragmatic to allow it than doing some complex validation gymnastics to prevent it. (#10329)
Services: Kea DHCPv6: Always start the prefix watcher when DHCPv6 is enabled. A reservation with a prefix but without a configured pd_pool is also valid, it's more pragmatic to allow it than doing some complex validation gymnastics to prevent it.
firewall: fold legacu DHCPv6 rules a bit more
track6 can test on its own and in this case the presence of the
plugin is also required for automatic configuration mode to work.
filter: DHCPv6 server rules for track mode should be excluded in "Identity association" mode, which uses the same field [track6-interface] to determine which interface to bind to. closes https://github.com/opnsense/core/issues/10316
Gateway Groups: convert to MVC (#10205)
Code performs an inline migration and updates only some callers that directly depended on the old configuration bits. Some convenience functions have been added to GatewayGroups.php to allow for easy configuration access and to satisfy some of the caller demands.
In addition, this code Adjusts the gateway_watcher to now trigger based on Gateway Group trigger level as well, limiting the amount of times alarms/alerts are being generated (and thus potentially unnecessary fw reconfigurations).
