code: protected final OperationStatus matchStatus(String line,
        OperationStatus... statii) {
      OperationStatus rv = null;
      for (OperationStatus status : statii) {
        if (line.equals(status.getMessage())) {
          rv = status;
        }
      }
      if (rv == null) {
        rv = new OperationStatus(false, line, StatusCode.fromAsciiLine(line));
      }
      return rv;
    }
docs: Match the status line provided against one of the given OperationStatus
  objects. If none match, return a failure status with the given line.
  
  @param line the current line
  @param statii several status objects
  @return the appropriate status object