docs: private static void _parseHeaderLine (@Nonnull final FileItemHeaders aHeaders, @Nonnull final String sHeader)
    {
      final int nColonOffset = sHeader.indexOf (':');
      if (nColonOffset == -1)
      {
        // This header line is malformed, skip it.
        if (LOGGER.isWarnEnabled ())
          LOGGER.warn ("Found malformed HTTP header line '" + sHeader + "'");
        return;
      }
      final String sHeaderName = sHeader.substring (0, nColonOffset).trim ();
      final String sHeaderValue = sHeader.substring (sHeader.indexOf (':') + 1).trim ();
      aHeaders.addHeader (sHeaderName, sHeaderValue);
    }