SimplePie_Misc::percent_encoding_normalization

		$iri->scheme = $scheme;
		$iri->authority = $authority;
		$iri->path = $path;
		$iri->query = $query;
		$iri->fragment = $fragment;
		return $iri->get_uri();
	}

	public static function normalize_url($url)
	{
		$iri = new SimplePie_IRI($url);
		return $iri->get_uri();