MDL-82652 core: Fix upstream bug in nikic/fast-route

See the following upstream issues for further information:

- nikic/FastRoute#292
- nikic/FastRoute#293

Author: andrewnicols

lib/nikic/fast-route/readme_moodle.txt

@@ -0,0 +1,8 @@
+Instructions to import/update nikic/fast-route into Moodle:
+
+1. Update any dependencies
+2. Download the latest release from https://github.com/nikic/fast-route
+3. Replace the files in nikic/fast-route with those in the zip
+
+Moodle-specific patches
+* Fixed a bug in unlimited optional placeholders: https://github.com/nikic/FastRoute/pull/293

lib/nikic/fast-route/src/RouteCollector.php

@@ -38,7 +38,7 @@ public function __construct(RouteParser $routeParser, DataGenerator $dataGenerat
     public function addRoute($httpMethod, $route, $handler)
     {
         $route = $this->currentGroupPrefix . $route;
-        $routeDatas = $this->routeParser->parse($route);
+        $routeDatas = array_reverse($this->routeParser->parse($route));
         foreach ((array) $httpMethod as $method) {
             foreach ($routeDatas as $routeData) {
                 $this->dataGenerator->addRoute($method, $routeData, $handler);