HTTP API: Add support for a description for HTTP status code 103.

Props Dhruvin

Fixes #42490


git-svn-id: https://develop.svn.wordpress.org/trunk@42207 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/functions.php

@@ -967,6 +967,9 @@ function wp( $query_vars = '' ) {
  * Retrieve the description for the HTTP status.
  *
  * @since 2.3.0
+ * @since 3.9.0 Added status codes 418, 428, 429, 431, and 511.
+ * @since 4.5.0 Added status codes 308, 421, and 451.
+ * @since 5.0.0 Added status code 103.
  *
  * @global array $wp_header_to_desc
  *
@@ -983,6 +986,7 @@ function get_status_header_desc( $code ) {
 			100 => 'Continue',
 			101 => 'Switching Protocols',
 			102 => 'Processing',
+			103 => 'Early Hints',
 
 			200 => 'OK',
 			201 => 'Created',