pfSense

UPnP rule/service cleanup. Fixes #13755

• Fix several incorrect config paths/tests
• Fix UPnP local interface automatic rule to pass traffic into UPnP
  itself.
• Wrap all rules/anchors in UPnP enabled test, no reason for them to be
  in the ruleset if UPnP is off....

Rector direct global g accesses

Rector some direct config gets with pure scalar paths.

Fix typo

Reorganize UPnP options. Todo #12624

UPnP STUN configuration. Feature #10587

Fix PHP7 error in miniupnpd.inc

Some tweaks to improve alignment in table with checkbox

1) If a checkbox does not have a description (even if it is empty), layout will be broken as checkbox won't be aligned correctly

2) UPnP checkbox looks better with description instead of help

This commit fixes the two issues

Whitespace cleanup

Make model_number customizable