REST API: Trim trailing slashes from routes.

WordPress' rewrites do this usually, but the behaviour was inconsistent when using non-pretty permalinks.

Props joehoyle.
Fixes #38873.

Built from https://develop.svn.wordpress.org/trunk@39329


git-svn-id: http://core.svn.wordpress.org/trunk@39269 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/rest-api.php

@@ -256,7 +256,7 @@ function rest_api_loaded() {
 	$server = rest_get_server();
 
 	// Fire off the request.
-	$server->serve_request( $GLOBALS['wp']->query_vars['rest_route'] );
+	$server->serve_request( untrailingslashit( $GLOBALS['wp']->query_vars['rest_route'] ) );
 
 	// We're done.
 	die();

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-beta4-39328';
+$wp_version = '4.7-beta4-39329';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.