Do not rely on GLOB_BRACE as it is not available on musl based systems

app/Foundation/Providers/RouteServiceProvider.php

@@ -89,12 +89,7 @@ class RouteServiceProvider extends ServiceProvider
         $router->group(['namespace' => $this->namespace, 'as' => 'core::'], function (Router $router) {
             $path = app_path('Http/Routes');
 
-            // GLOB_BRACE is defined as 0, check the source!
-            // https://github.com/php/php-src/blob/31e4afe3c3654f9c5ab2eafa3a02c62d41c58b47/ext/standard/dir.c#L154-L158
-            $globBrace = defined('GLOB_BRACE') ? GLOB_BRACE : 0;
-            $globFlag = $globBrace;
-
-            foreach (glob("{$path}/*{,/*}.php", $globFlag) as $file) {
+            foreach (array_merge(glob("$path/*.php"), glob("$path/*/*.php")) as $file) {
                 $class = substr($file, strlen($path));
                 $class = str_replace('/', '\\', $class);
                 $class = substr($class, 0, -4);