adblock: release 4.5.0-1

adblock: release 4.5.0-1

* added firewall rules based on nftables in a separate isolated nftables table (inet adblock)
  and chains (prerouting), with MAC addresses stored in an nftables set.
  Implemented the following firewall‑integrated features:
  * external DNS Routing (unfiltered): routes DNS queries from selected devices or interfaces
    to an external unfiltered DNS resolver
  * external DNS Routing (filtered): routes DNS queries from selected devices or interfaces
    to an external filtered DNS resolver
  * force DNS: blocks or redirects all external DNS traffic from selected interfaces
    to ensure that clients use the local resolver
* removed the optional generation of an additional jail list (only supported bydnsmasq),
  use the new, resolver independent ext. DNS routing instead
* removed the pz-client-ip feature (only supported by bind),
  use the new, resolver independent ext. DNS routing instead
* removed the obsolete, hardcoded fw4 rules for DNS enforcement
  existing rules will be removed via uci-defaults script after adblock update
* changed the Jail mode to a simple allowlist-only mode
* fixed minor issues in the mail template
* readme update
* LuCI: added a new config tab "Firewall Settings"
* LuCI: fixed minor usability issues

Signed-off-by: Dirk Brenken <redacted>