* and return successful suffix or throw an UnknownHostException.
     * import javax.naming.*;
     * import javax.naming.directory.*;
     * public static String getDomainByName(String name) throws UnknownHostException {
     * DirContext context;
     * UnknownHostException uhe = null;
     *
     * try {
     * context = new InitialDirContext();
     * for ( ;; ) {
     * try {