Fix the whole UTF-8 Onyx/XML parsing logic to properly work.

Fix the whole UTF-8 Onyx/XML parsing logic to properly work.
PHP5 did not need xml_parser_create() to specify a charset, but PHP4 does.
PHP5 made errors when feeds in UTF-8 were double-recoded because of a xml_parser_set_option() call without specifying the charset in xml_parser_create.
Hope this works. ;)