The rules are simple:

* plugins_configure() requires all available plugins, probes their
  configure functions and then calls the advertised functions.

* All GUI pages must directly include their includes in plugins.inc.d
  to not overly pollute their loading phase.

For now plugins.inc and ipsec.inc will coexist on pages that
may need only one or none to avoid unefined function errors.
This will be pruned after investigating the contents of both
files...

This doesn't work out at all for the fact that the control picks
up the first instance it finds, either client or server, but not
clearly stating so.  That's why there is a status page with all
the services for clients and servers...

services.inc already includes unbound.inc and miniupnpd.inc so
it's safe to do this...

Improve redirect to avoid removing the savemsg which can be useful
and start to use the service array instead of the plain name.  This
is going to help with moving all the start/restart/stop info into
the service array creation for base services as well as plugin
services.

The widget collection needs a cleanup, but is not at the top of the priority list. Lets make sure the legacy functionality delivers output and make sure the already cleaned components stay that way.

(legacy) fix html error issue in firewall_aliases_edit.php, https://github.com/opnsense/core/issues/785