pfSense

Use config accessors in users and groups functions

Correctly detect changed settings

Fix typos and copy/paste issues

Issues found by the PHP linter mostly include typos and usage of
unassigned variables. To address these, traverse the commit history
to determine the intent.

Kill states on gateway failover recovery. Implement #855

Add option to set State Policy. Implements #15173

Also changes default policy to if-bound.

Merge pull request #4664 from opoplawski/no_system_dns

Clarify function use and description

Refactor system DNS check. Fix #15127

Update the years in the Copyright notice.

Remove TOTH. Fix NG#12636