From 7f0891c1a1f09d708eac81c5ef1b73bb9cd17965 Mon Sep 17 00:00:00 2001
From: Dion Hulse <dd32@git.wordpress.org>
Date: Wed, 28 Aug 2013 04:58:51 +0000
Subject: [PATCH] WP_HTTP: When requesting a document with HTTP/1.1 include the
 'Connection: Close' header (unless a Connection header is already specified)
 to prevent the connection being held open and hanging the request process.
 See #23463

git-svn-id: https://develop.svn.wordpress.org/trunk@25150 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/class-http.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/wp-includes/class-http.php b/src/wp-includes/class-http.php
index 0c57ccc906..b1bfef3e1f 100644
--- a/src/wp-includes/class-http.php
+++ b/src/wp-includes/class-http.php
@@ -172,6 +172,10 @@ class WP_Http {
 			unset( $r['headers']['user-agent'] );
 		}
 
+		if ( '1.1' == $r['httpversion'] && !isset( $r['headers']['connection'] ) ) {
+			$r['headers']['connection'] = 'close';
+		}
+
 		// Construct Cookie: header if any cookies are set
 		WP_Http::buildCookieHeader( $r );