firewall aliases table with fqdn stays in system after deleting
If you create Alias table under Firewall / Aliases / IP with FQDNs,
PF table with such name stays in system after you delete alias.
it just became empty after "deleting".
you can see that empty table on Diagnostics / Tables or with pfctl -sT
it's not deleted if you do "Filter reload".
it seems there is needed "pfctl -t <alias_name> -T kill" command in firewall_aliases.php
built on Tue Sep 24 11:35:34 EDT 2019