this.revision = Byte.parseByte(st.nextToken());
        String tmp = st.nextToken();
        long id = 0;
        if ( tmp.startsWith("0x") )
            id = Long.parseLong(tmp.substring(2), 16);
        else
            id = Long.parseLong(tmp);

        this.identifier_authority = new byte[6];
        for ( int i = 5; id > 0; i-- ) {
            this.identifier_authority[ i ] = (byte) ( id % 256 );

     */
    public static long getLong ( Properties props, String key, long def ) {
        String s = props.getProperty(key);
        if ( s != null ) {
            try {
                def = Long.parseLong(s);
            }
            catch ( NumberFormatException nfe ) {
                log.error("Not a number", nfe);
            }
        }
        return def;
    }


    /**

        this.revision = Byte.parseByte(st.nextToken());
        String tmp = st.nextToken();
        long id = 0;
        if (tmp.startsWith("0x"))
            id = Long.parseLong(tmp.substring(2), 16);
        else
            id = Long.parseLong(tmp);

        this.identifier_authority = new byte[6];
        for (int i = 5; id > 0;  i--) {
            this.identifier_authority[i] = (byte) (id % 256);
            id >>= 8;

                ai++;
                t.numIter = Integer.parseInt(args[ai]);
            } else if (args[ai].equals("-d")) {
                ai++;
                t.delay = Long.parseLong(args[ai]);
            } else {
                t.url = args[ai];
            }
        }

        Thread[] threads = new Thread[t.numThreads];
        int ti;

        for (ti = 0; ti < t.numThreads; ti++) {

     */

    public static long getLong( String key, long def ) {
        String s = prp.getProperty( key );
        if( s != null ) {
            try {
                def = Long.parseLong( s );
            } catch( NumberFormatException nfe ) {
                if( log.level > 0 )
                    nfe.printStackTrace( log );
            }
        }
        return def;
    }