Extract entries from the xinetd config files.

def _ProcessEntries(self, fd):
    """Extract entries from the xinetd config files."""
    p = config_file.KeyValueParser(kv_sep="{", term="}", sep=None)
    data = utils.ReadFileBytesAsUnicode(fd)
    entries = p.ParseEntries(data)
    for entry in entries:
      for section, cfg in iteritems(entry):
        # The parser returns a list of configs. There will only be one.
        if cfg:
          cfg = cfg[0].strip()
        else:
          cfg = ""
        self._ParseSection(section, cfg)