Add `duckdns.org` to reject hosts

Build/worker/build-reject-domainset-worker.js

@@ -66,7 +66,7 @@ module.exports = ({ chunk }) => {
 
 // duckdns.org domain will not overlap and doesn't need dedupe
 function canExcludeFromDedupe(domain) {
-  if (domain.endsWith('.duckdns.org')) {
+  if (domain.length === 23 && domain.endsWith('.duckdns.org')) {
     return true;
   }
   return false;

List/non_ip/reject.conf

@@ -35,6 +35,7 @@ DOMAIN-KEYWORD,49329d48d6c.
 DOMAIN-KEYWORD,vsvevvcca
 DOMAIN-KEYWORD,envci.
 DOMAIN-KEYWORD,aarsenvs.
+DOMAIN-SUFFIX,duckdns.org
 
 # --- End of Blacklist Section