if z.OldDataDir == "" {
		zb0001Len--
		zb0001Mask |= 0x10
	}
	// variable map header, size zb0001Len
	o = append(o, 0x80|uint8(zb0001Len))
	if zb0001Len == 0 {
		return
	}
	// string "BaseOptions"
	o = append(o, 0xab, 0x42, 0x61, 0x73, 0x65, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73)
	// map header, size 0
	_ = z.BaseOptions
	o = append(o, 0x80)
	// string "r"
	o = append(o, 0xa1, 0x72)

      0x7fb, 0xfa, 0x16, 0x17, 0x18, 0x0, 0x1, 0x2, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
      0x5c, 0xfb, 0x7ffc, 0x20, 0xffb, 0x3fc, 0x1ffa, 0x21, 0x5d, 0x5e, 0x5f, 0x60, 0x61,
      0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
      0x70, 0x71, 0x72, 0xfc, 0x73, 0xfd, 0x1ffb, 0x7fff0, 0x1ffc, 0x3ffc, 0x22, 0x7ffd, 0x3,

          return 0x80;
        } else if (userFriendly.matches("(?i)(?:French|Latin|Western.*European)")) {
          // Mostly 1-byte UTF-8 sequences, mixed with occasional 2-byte
          // sequences - "Western European" text
          return 0x90;
        } else if (userFriendly.matches("(?i)(?:Branch.*Prediction.*Hostile)")) {
          // Defeat branch predictor for: c < 0x80 ; branch taken 50% of the time.

          return 0x80;
        } else if (userFriendly.matches("(?i)(?:French|Latin|Western.*European)")) {
          // Mostly 1-byte UTF-8 sequences, mixed with occasional 2-byte
          // sequences - "Western European" text
          return 0x90;
        } else if (userFriendly.matches("(?i)(?:Branch.*Prediction.*Hostile)")) {
          // Defeat branch predictor for: c < 0x80 ; branch taken 50% of the time.

	// write "ReplicaTimeStamp"
	err = en.Append(0x8a, 0xb0, 0x52, 0x65, 0x70, 0x6c, 0x69, 0x63, 0x61, 0x54, 0x69, 0x6d, 0x65, 0x53, 0x74, 0x61, 0x6d, 0x70)
	if err != nil {
		return
	}
	err = en.WriteTime(z.ReplicaTimeStamp)
	if err != nil {
		err = msgp.WrapError(err, "ReplicaTimeStamp")
		return
	}
	// write "ReplicaStatus"
	err = en.Append(0xad, 0x52, 0x65, 0x70, 0x6c, 0x69, 0x63, 0x61, 0x53, 0x74, 0x61, 0x74, 0x75, 0x73)

    private static final int NAME_SERVICE_UDP_PORT = 137;

    static final byte[] UNKNOWN_MAC_ADDRESS = new byte[] {
        (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
    };

    private static final Logger log = LoggerFactory.getLogger(NameServiceClientImpl.class);

    private final Object LOCK = new Object();

    private int nbnsIndex = 0;

	o = msgp.AppendUint64(o, z.ItemsSkipped)
	// string "BytesSkipped"
	o = append(o, 0xac, 0x42, 0x79, 0x74, 0x65, 0x73, 0x53, 0x6b, 0x69, 0x70, 0x70, 0x65, 0x64)
	o = msgp.AppendUint64(o, z.BytesSkipped)
	// string "RetryAttempts"
	o = append(o, 0xad, 0x52, 0x65, 0x74, 0x72, 0x79, 0x41, 0x74, 0x74, 0x65, 0x6d, 0x70, 0x74, 0x73)
	o = msgp.AppendUint64(o, z.RetryAttempts)

    assertThat(Buffer().writeUtf8("white\t space").isProbablyUtf8()).isTrue()
    assertThat(Buffer().writeByte(0x80).isProbablyUtf8()).isTrue()
    assertThat(Buffer().writeByte(0x00).isProbablyUtf8()).isFalse()
    assertThat(Buffer().writeByte(0xc0).isProbablyUtf8()).isFalse()
  }

    int readRDataWireFormat( byte[] src, int srcIndex ) {
        if( resultCode != 0 || opCode != QUERY ) {
            return 0;
        }
        boolean groupName = (( src[srcIndex] & 0x80 ) == 0x80 ) ? true : false;
        int nodeType = ( src[srcIndex] & 0x60 ) >> 5;
        srcIndex += 2;
        int address = readInt4( src, srcIndex );
        if( address != 0 ) {

     * is queried frequently and exceptions would be rather costly to
     * throw on a regular basis here.
     */

    public synchronized static NbtAddress getByName( String host ) {
        return getByName( new Name( host, 0x20, null ));
    }

    synchronized static NbtAddress getByName( Name name ) {
        NbtAddress result = null;

        try {
            if( FILENAME != null ) {
                File f = new File( FILENAME );