Strip control characters before validating redirect.

Merges [40183] to 4.6 branch.

Built from https://develop.svn.wordpress.org/branches/4.6@40185


git-svn-id: http://core.svn.wordpress.org/branches/4.6@40124 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/pluggable.php

@@ -1278,7 +1278,7 @@ if ( !function_exists('wp_validate_redirect') ) :
  * @return string redirect-sanitized URL
  **/
 function wp_validate_redirect($location, $default = '') {
-	$location = trim( $location );
+	$location = trim( $location, " \t\n\r\0\x08\x0B" );
 	// browsers will assume 'http' is your protocol, and will obey a redirect to a URL starting with '//'
 	if ( substr($location, 0, 2) == '//' )
 		$location = 'http:' . $location;