pfSense

rc.linkup code refresh and fixes. Fixes #13254

• Update code to be more compatible with PHP 8.1
• Consistency changes to code and logging so every path has similar
  output instead of some being unusually different.
• Do not restart unbound on linkup as other mechanisms already do that
  which only leads to it being restarted multiple times.
• Restart unbound on linkdown so that if an interface was used for local
  binding or outgoing queries it gets removed from those lists while
  down.
• Other misc cleanup while I'm in here.