undocument forceAllowTG0 option, this option is undocumented now and is really only intended for debugging purposes;

configs/config.example.yml

@@ -291,10 +291,6 @@ protocols:
         #   (This applies only in conventional operations where channel granting is utilized and RF-only talkgroup
         #    steering is required.)
         disableNetworkGrant: false
-        # Flag indicating whether or not TGID 0 (P25 blackhole talkgroup) will be allowed.
-        #   (Normally this should *never* be enabled, it is here to support poorly behaved systems that transmit
-        #    TGID 0 for some reason.)
-        forceAllowTG0: false
         # Flag indicating whether or not a TGID will be tested for affiliations before being granted.
         ignoreAffiliationCheck: false
         # Flag indicating whether or not a P25 TDU (call terminator) will occur to the network immmediately after a