Merge pull request #37 from YouJustDontKnow/enr-encoding-fix

ENR encoding fixture
diff --git a/devp2p/src/main/kotlin/org/apache/tuweni/devp2p/EthereumNodeRecord.kt b/devp2p/src/main/kotlin/org/apache/tuweni/devp2p/EthereumNodeRecord.kt
index 776450e..61743a0 100644
--- a/devp2p/src/main/kotlin/org/apache/tuweni/devp2p/EthereumNodeRecord.kt
+++ b/devp2p/src/main/kotlin/org/apache/tuweni/devp2p/EthereumNodeRecord.kt
@@ -85,7 +85,6 @@
       }
       udp?.let {
         mutableData["udp"] = Bytes.ofUnsignedShort(it)
-        writer.writeString("udp")
       }
       mutableData.keys.sorted().forEach { key ->
           mutableData[key]?.let { value ->