pfSense

miniupnpd: Generate miniupnpd config using more explicit bools

The miniupnp config section has boolean flags that are either true with the value
'on', and are inferred to be false by omission or an empty value. To be more
explicit when generating the miniupnpd config, compare these values to 'on'...

Generate the UUID using the external interface MAC

Use the configured external interface to generate the UUID and serial for
miniupnpd.conf. Additionally, resort to using a random MAC on failure.

Update UPnP IGD & PCP GUI text. Implements #15864

UPnP IGD & PCP: No need to enter STUN port and update example servers

(#4717)

UPnP IGD & PCP: Simplify UI and finalise wording and descriptions update

(#4717)

UPnP IGD & PCP: Improve descriptions

UPnP IGD & PCP: Simplify service wording

and change menu/title to `UPnP IGD & PCP` as newer PCP is supported

Revert "Update text references to UPnP protocols"

This reverts commit 429312ff683b5762d0cb6eca69c474121a9dfca1.

Update text references to UPnP protocols

Update all direct config access with accessor functions