CVE-2012-0037

Enforce entity loading policy in raptor_libxml_resolveEntity
and raptor_libxml_getEntity by checking for file URIs and network URIs.

Add RAPTOR_OPTION_LOAD_EXTERNAL_ENTITIES / loadExternalEntities for
turning on loading of XML external entity loading, disabled by default.

This affects all the parsers that use SAX2: rdfxml, rss-tag-soup (and
aliases) and rdfa.
raptor_init_parser_rdfxml(raptor_world* world)
{
  return !raptor_world_register_parser_factory(world,
                                               &raptor_rdfxml_parser_register_factory);
}

raptor_init_parser_rdfxml(raptor_world* world)
{
  return !raptor_world_register_parser_factory(world,
                                               &raptor_rdfxml_parser_register_factory);
}
