This needs much maintenance, it's amazing really.

this whole procedure still seems a bit off when being called in return_gateway_groups_array(), maybe we should move this to a more sane location at some other point in time:

Now the old manual cron job only updates DynDNS, but the autocron
will fix itself...  :)

Also try to unclog the use of requires and naming, we don't want
stuff like "dyndns/dyndns.class" so let's go back to the roots
and call the file phpdns.inc like the original prjoject was.

(gwlb.inc) ok, this looks odd, I can't find a valid use of "ipprotocol" in the gatewaygroups. (other then the one filter.inc)

(groups) align groupname length, like https://github.com/opnsense/core/commit/0829a34cef456c0065435405e965c45e8077d369