code: public static void showUsage(String errMessage) {
          System.out.println("Error: " + errMessage);
          System.out.println("");
          System.out
                  .println("Usage: AutoModify host:port user password "
                          + "directives-filepath log-filepath protocol [validate-only-option] [context]");
          System.out.println("Note: protocol must be either http or https.");
      }
docs: <p>
  Displays the command-line syntax.
  </p>
  
  @param errMessage -
  The error message to be displayed.