remove resolvedAddress if it matches the original address in nginx and ddns updater

Author: sylphrena0

backend/internal/nginx.js

@@ -148,6 +148,8 @@ const internalNginx = {
 						.then((resolvedIP) => {
 							if (resolvedIP !== address) {
 								Object.defineProperty(client, 'resolvedAddress', {value: resolvedIP});
+							} else {
+								delete client.resolvedAddress;
 							}
 							return Promise.resolve();
 						});

backend/lib/ddns_resolver/ddns_updater.js

@@ -92,6 +92,9 @@ const ddnsUpdater = {
 						}
 						const p = ddnsResolver.resolveAddress(address, true)
 							.then((resolvedIP) => {
+								if (resolvedIP === address) {
+									updatedAddresses.delete(address);
+								}
 								if (resolvedIP !== address && resolvedIP !== oldIP) {
 									// Mark this as an updated address
 									updatedAddresses.set(address, rows);