pfSense

Add check for empty interface

Callers may call get_real_interface() with an empty interface;
bail early if so.

Tighten DHCP client rules. Fixes #15702

Avoid config access with unknown userid

Handle empty variable

Callers of these functions may send null variabes; bail early if so.

Fix input validation for gateway

Set the working directory before checking unbound config. Fix #15723

Improve localhost DNS checks. Fix #15722

Include GUI logout in auth log. Fix #15719

User logouts do not need to be as loud as user logins. Include
them in the auth log but make them quiet for the console.

Allow adding package menus with different sections

A package may have multiple menus with the same name but
different sections.

Improve thermal widget readability

Add a margin between progress bars and sort sensors.