minor cleanup

router/java/src/net/i2p/router/transport/TransportUtil.java

@@ -98,7 +98,7 @@ public abstract class TransportUtil {
      */
     public static boolean isIPv6(RouterAddress addr) {
         // do this the fast way, without calling getIP() to parse the host string
-        String host = addr.getOption(RouterAddress.PROP_HOST);
+        String host = addr.getHost();
         return host != null && host.contains(":");
     }
 

router/java/src/net/i2p/router/transport/udp/UDPAddress.java

@@ -68,7 +68,7 @@ class UDPAddress {
             _introKey = null;
             return;
         }
-        _host = addr.getOption(PROP_HOST);
+        _host = addr.getHost();
         _port = addr.getPort();
         try { 
             String mtu = addr.getOption(PROP_MTU);