Add missing HTTP status code descriptions (specifically 308 and 421.)

Props kraftbj.
Fixes 35336.


git-svn-id: https://develop.svn.wordpress.org/trunk@36274 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/functions.php

@@ -994,6 +994,7 @@ function get_status_header_desc( $code ) {
 			305 => 'Use Proxy',
 			306 => 'Reserved',
 			307 => 'Temporary Redirect',
+			308 => 'Permanent Redirect',
 
 			400 => 'Bad Request',
 			401 => 'Unauthorized',
@@ -1014,6 +1015,7 @@ function get_status_header_desc( $code ) {
 			416 => 'Requested Range Not Satisfiable',
 			417 => 'Expectation Failed',
 			418 => 'I\'m a teapot',
+			421 => 'Misdirected Request',
 			422 => 'Unprocessable Entity',
 			423 => 'Locked',
 			424 => 'Failed Dependency',