XML-RPC: `IXR_Server::output()` is notoriously bad at returning the right value for the `Content-Length` HTTP header. This header is not required, so we will remove it.

"We could of course remove the content-length header as it is not required" was suggested 10 years ago. The IXR library is not maintained. Our release is the latest, which occurred in 2010.

Fixes #2567.

Built from https://develop.svn.wordpress.org/trunk@34571


git-svn-id: http://core.svn.wordpress.org/trunk@34535 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-IXR.php

@@ -540,7 +540,6 @@ EOD;
             $xml = '<?xml version="1.0"?>'."\n".$xml;
         $length = strlen($xml);
         header('Connection: close');
-        header('Content-Length: '.$length);
         if ($charset)
             header('Content-Type: text/xml; charset='.$charset);
         else

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34570';
+$wp_version = '4.4-alpha-34571';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.