Add load balancer slupport

config-example.json

@@ -21,8 +21,21 @@
       ]
     }
   ],
+  "load_balancer": [
+    {
+      "authentication": {
+        "api_token": "api_token_here",
+        "api_key": {
+          "api_key": "api_key_here",
+          "account_email": "your_email_here"
+        }
+      },
+      "pool_id": "your_pool_id_here",
+      "origin": "your_origin_name_here"
+    }
+  ],
   "a": true,
   "aaaa": true,
   "purgeUnknownRecords": false,
   "ttl": 300
-}
+}