HTTP API: Add the missing `1xx` HTTP response codes as constants of the `WP_Http` class, and add tests to ensure all available response codes are covered.

Fixes #36294

Built from https://develop.svn.wordpress.org/trunk@36749


git-svn-id: http://core.svn.wordpress.org/trunk@36716 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-http.php

@@ -21,6 +21,10 @@
 class WP_Http {
 
 	// Aliases for HTTP response codes.
+	const HTTP_CONTINUE                   = 100;
+	const SWITCHING_PROTOCOLS             = 101;
+	const PROCESSING                      = 102;
+
 	const OK                              = 200;
 	const CREATED                         = 201;
 	const ACCEPTED                        = 202;

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-beta1-36748';
+$wp_version = '4.5-beta1-36749';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.