* translate dialog titles; closes #1546
* Some additional strings reported by @DokuKaefer

firewall, work in progress,  refactor gateway logic, only extends new plugin -> filterrule classes, doesn't change the internals yet.

gwlb, found the use... https://github.com/opnsense/core/commit/2dbc3ab259cb7b141d1900b8dea8a503d17ddf72

We previously achieved what we wanted anyway: move all callers
to a single file exclusively dealing with unbound.

There is still some glue in the product info that is irrelevant
to the product.  Will be removed eventually.

It may help users to find what they think are "packages", but
for consistency reasons was recoined as "plugins".

php7.1, Error at /usr/local/opnsense/www/api.php:26 - Invalid callback OPNsense\Core\Api\MenuController::afterexecuteroute, cannot access protected method OPNsense\Core\Api\MenuController::afterExecuteRoute() (errno=2)

PR: https://github.com/opnsense/core/pull/1524

* RFC2136 missed the edit page completely
* DynDNS ACLs merged, we do it by feature

(proxy) virtualip's should be added automatically for listening configuration, this was the case for some types, but not for all (CARP)

Note that require_once is bad as well here, because it throws another
uncatched error as opposed to a warning when a file has not been found.
Now it is better in recovery, although 99% of the time this is supposed
to deal with syntax errors during bad core/plugin updates or manual
user edits.

It's also useful to note that the errors/warnings still make their way
to the crash reporter so we can do something about them.

Suggested by: @fabianfrz