Restore trackback_rdf(). reverts [13991]. fixes #11139 for trunk.

git-svn-id: http://svn.automattic.com/wordpress/trunk@15363 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/comment-template.php

@@ -735,6 +735,36 @@ function trackback_url( $deprecated_echo = true ) {
 		return get_trackback_url();
 }
 
+/**
+ * Generates and displays the RDF for the trackback information of current post.
+ *
+ * Deprecated in 3.0.0, and restored in 3.0.1.
+ *
+ * @since 0.71
+ *
+ * @param int $deprecated Not used (Was $timezone = 0)
+ */
+function trackback_rdf( $deprecated = '' ) {
+	if ( !empty( $deprecated ) )
+		_deprecated_argument( __FUNCTION__, '2.5' );
+
+	if ( false !== stripos($_SERVER['HTTP_USER_AGENT'], 'W3C_Validator') )
+		return;
+
+	echo '<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+			xmlns:dc="http://purl.org/dc/elements/1.1/"
+			xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/">
+		<rdf:Description rdf:about="';
+	the_permalink();
+	echo '"'."\n";
+	echo '    dc:identifier="';
+	the_permalink();
+	echo '"'."\n";
+	echo '    dc:title="'.str_replace('--', '&#x2d;&#x2d;', wptexturize(strip_tags(get_the_title()))).'"'."\n";
+	echo '    trackback:ping="'.get_trackback_url().'"'." />\n";
+	echo '</rdf:RDF>';
+}
+
 /**
  * Whether the current post is open for comments.
  *

wp-includes/deprecated.php

@@ -2501,19 +2501,6 @@ function funky_javascript_fix($text) {
 	return $text;
 }
 
-/**
- * Generates and displays the RDF for the trackback information of current post.
- *
- * @since 0.71
- * @deprecated 3.0.0
- *
- * @param int $deprecated Not used (Was $timezone = 0)
- */
-function trackback_rdf($deprecated = '') {
-	_deprecated_function( __FUNCTION__, '3.0' );
-	return '';
-}
-
 /**
  * Checks that the taxonomy name exists.
  *