Firewall: Rules [new] - add temporary validation to only support divert-to on IPv4 (as long as IPv6 doesn't work properly in pf)

src/opnsense/mvc/app/models/OPNsense/Firewall/Filter.php

@@ -260,6 +260,12 @@ class Filter extends BaseModel
                                 $rule->{'divert-to'}->__reference
                             ));
                         }
+                        if (!$rule->{'divert-to'}->isEmpty() && $rule->ipprotocol != 'inet') {
+                            $messages->appendMessage(new Message(
+                                gettext("Divert-to is currently only supported for IPv4 rules."),
+                                $rule->{'divert-to'}->__reference
+                            ));
+                        }
                     }
                 }
             }