Allow plugins to filter the redirect status as well as the location. See #4790.

git-svn-id: https://develop.svn.wordpress.org/trunk@7319 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/pluggable.php

@@ -673,7 +673,8 @@ function wp_redirect($location, $status = 302) {
 	global $is_IIS;
 
 	$location = apply_filters('wp_redirect', $location, $status);
-
+	$status = apply_filters('wp_redirect_status', $status, $location);
+	
 	if ( !$location ) // allows the wp_redirect filter to cancel a redirect
 		return false;