Fix inability to edit certain environment vars and start line, closes pterodactyl#1008

Author: DaneEveritt

CHANGELOG.md

@@ -8,6 +8,7 @@ This project follows [Semantic Versioning](http://semver.org) guidelines.
 * Fixes a bug when reinstalling a server that would not mark the server as installing, resulting in some UI issues.
 * Handle 404 errors from missing models in the application API bindings correctly.
 * Fix validation error returned when no environment variables are passed, even if there are no variables required.
+* Fix improper permissions on `PATCH /api/servers/<id>/startup` endpoint which was preventing enditing any start variables.
 
 ### Added
 * Adds back client API for sending commands or power toggles to a server though the Panel API: `/api/client/servers/<identifier>`

app/Http/Controllers/Api/Application/Servers/StartupController.php

@@ -2,6 +2,7 @@
 
 namespace Pterodactyl\Http\Controllers\Api\Application\Servers;
 
+use Pterodactyl\Models\User;
 use Pterodactyl\Models\Server;
 use Pterodactyl\Services\Servers\StartupModificationService;
 use Pterodactyl\Transformers\Api\Application\ServerTransformer;
@@ -40,7 +41,9 @@ public function __construct(StartupModificationService $modificationService)
      */
     public function index(UpdateServerStartupRequest $request): array
     {
-        $server = $this->modificationService->handle($request->getModel(Server::class), $request->validated());
+        $server = $this->modificationService
+            ->setUserLevel(User::USER_LEVEL_ADMIN)
+            ->handle($request->getModel(Server::class), $request->validated());
 
         return $this->fractal->item($server)
             ->transformWith($this->getTransformer(ServerTransformer::class))