I2NP BRR: Minor cleanup and javadoc note

router/java/src/net/i2p/data/i2np/BuildRequestRecord.java

@@ -20,7 +20,7 @@ import net.i2p.data.SessionKey;
  * Cleartext:
  * <pre>
  *   bytes     0-3: tunnel ID to receive messages as
- *   bytes    4-35: local router identity hash
+ *   bytes    4-35: local router identity hash (Unused and no accessor here)
  *   bytes   36-39: next tunnel ID
  *   bytes   40-71: next router identity hash
  *   bytes  72-103: AES-256 tunnel layer key

router/java/src/net/i2p/data/i2np/BuildResponseRecord.java

@@ -34,7 +34,7 @@ public class BuildResponseRecord {
         //Log log = ctx.logManager().getLog(BuildResponseRecord.class);
         byte rv[] = new byte[TunnelBuildReplyMessage.RECORD_SIZE];
         ctx.random().nextBytes(rv, Hash.HASH_LENGTH, TunnelBuildReplyMessage.RECORD_SIZE - Hash.HASH_LENGTH - 1);
-        DataHelper.toLong(rv, TunnelBuildMessage.RECORD_SIZE-1, 1, status);
+        rv[TunnelBuildMessage.RECORD_SIZE-1] = (byte) status;
         // rv = AES(SHA256(padding+status) + padding + status, replyKey, replyIV)
         ctx.sha().calculateHash(rv, Hash.HASH_LENGTH, rv.length - Hash.HASH_LENGTH, rv, 0);
         //if (log.shouldLog(Log.DEBUG))