Bump the timeout in `trackback()` to 10 seconds (from 4) to match `wp_xmlrpc_server::pingback_ping()` and prevent trackback timeouts.

Props gnaka08 for the initial patch.
Fixes #10414.

Built from https://develop.svn.wordpress.org/trunk@33948


git-svn-id: http://core.svn.wordpress.org/trunk@33917 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/comment-functions.php

@@ -2208,7 +2208,7 @@ function trackback($trackback_url, $title, $excerpt, $ID) {
 		return;
 
 	$options = array();
-	$options['timeout'] = 4;
+	$options['timeout'] = 10;
 	$options['body'] = array(
 		'title' => $title,
 		'url' => get_permalink($ID),

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-33947';
+$wp_version = '4.4-alpha-33948';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.