The amount of work required in the past two years for this
original pfSense 2.2 item has been immense.  Still deleteing
unused functionality like the cache, "reload" not being
implemented, DHCPv6 static registration missing in action.

While there, dedup the dnsmasq static DHCP registration.

PR: https://github.com/opnsense/core/issues/1250
PR: https://github.com/opnsense/core/issues/624

(crashreport) something seems to trigger Phalcon\Mvc\View->render() before initialize() was called, not sure what it is, probably something changed in phalcon to trigger this in some cases.

exception 'Exception' with message 'The argument is not initialized or iterable()' in phalcon/mvc/view.zep:694
Stack trace:
 0 [internal function]: Phalcon\Mvc\View->_engineRender(Array, 'settings/listRu...', true, true, NULL)
 1 [internal function]: Phalcon\Mvc\View->render('settings', 'listRulesets', Array)
 2 /usr/local/opnsense/www/api.php(26): Phalcon\Mvc\Application->handle()

(auth/ldap) disable error reporting on connect, to prevent api to signal authentication errors as issues.

exception 'Exception' with message 'Error at /usr/local/opnsense/mvc/app/library/OPNsense/Auth/LDAP.php:236 - ldap_bind(): Unable to bind to server: Invalid credentials (errno=2)' in /usr/local/opnsense/mvc/app/controllers/OPNsense/Base/ApiControllerBase.php:84
Stack trace:
 0 [internal function]: OPNsense\Base\ApiControllerBase->APIErrorHandler(2,

o packages converted away from local/remote split (installed/provided)
o special plugins list to allow intelligent middle ware handling
o os(priv) on disk is shown even if not on remote (orphaned)
o -devel supports ospriv install from remote

(filter) move "bypassstaticroutes" into if_legacy_opt.inc, given the complexity and possible side-affects it would be better to trash the option at some point

(filter) move pptpd rules to a temporary spot. they belong to the plugin, but before we can change the plugin this code need to be active

Credits: https://redmine.pfsense.org/issues/4111

(menusystem) it's ok to link to an item on the page, as long as we don't try to match it back on the server end

192.254 is a legal IPv4 range.
169.254 is the correct private IPv4 address space.
Moved the order of the private address.