firewall: default pass all loopback without state tracking; closes #5367
firewall: default pass all loopback without state tracking; closes #5367

Idea by @kulikov-a.  While arguably not addressing the issue with
unbound-control directly but we can't wait for upstream to do this.

opnsense/core,opnsense/core,opnsense/core,opnsense/core,opnsense/core,opnsense/core