We do not want to have rc.firmware use the other scripts for
a number of reasons...

* Don't jump through configd in case it's dysfunct
* Don't use the normal script in case it's gone
* tee(1) output so that the console works as usual

Valid properties for interfaces currently are:

* enable (bool)
* virtual (bool)
* networks, list of networks (network, mask)
* if, device node
* descr, user friendly description

(captive portal) add option "drop expired vouchers", closes https://github.com/opnsense/core/issues/977

system_staticroutes_configure, remove dead code, add rc.newroutedns dependencies and make the optional alias use in static routes explicit with a typeahead

Lookie, privilege separation.  ;)

(filter, scrub) use firewall_scrub.php for traffic normalization. closes https://github.com/opnsense/core/issues/973

This reverts commit 88580477.

(filter, plugins, pppoe) work in progress, pppoe server contains more instances. wrap items in 'items' property, to maintain old code. eventually we may need to define the data structure better.