Update README.md for new config format

README.md

@@ -10,14 +10,22 @@ TODO
 
 ### CoreDNS configuration
 
-A sample Corefile that configures `mainnet.seeder.yolo.money` and `testnet.seeder.yolo.money` using two local Zcash nodes:
+A sample Corefile that configures seeders on a domain for each network, backed by two local Zcash nodes:
 
 ```
 mainnet.seeder.yolo.money {
-    dnsseed yolo.money mainnet 127.0.0.1:8233
+    dnsseed {
+        network mainnet
+        crawl_interval 30m
+        bootstrap_peers 127.0.0.1:8233
+    }
 }
 
 testnet.seeder.yolo.money {
-    dnsseed yolo.money testnet 127.0.0.1:18233
+    dnsseed {
+        network testnet
+        crawl_interval 30m
+        bootstrap_peers 127.0.0.1:18233
+    }
 }
 ```