Change DKIM to new method, add clamav forced action when virus is found"

data/conf/rspamd/local.d/force_actions.conf

@@ -4,4 +4,9 @@ rules {
     expression = "R_DKIM_REJECT & !MAILLIST & !MAILCOW_WHITE & !MAILCOW_BLACK";
     require_action = ["no action", "greylist"];
   }
+  VIRUS_FOUND {
+    action = "reject";
+    expression = "CLAM_VIRUS & !MAILCOW_WHITE";
+    honor_action = ["reject"];
+  }
 }