Add ValidateSignature middleware for ignore params (#5942)

* Add ValidateSignature middleware for ignore params

* Comment out query parameters by default

* Remove leading slash

* Update Kernel ValidateSignature middleware path

app/Http/Kernel.php

@@ -60,7 +60,7 @@ class Kernel extends HttpKernel
         'can' => \Illuminate\Auth\Middleware\Authorize::class,
         'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
         'password.confirm' => \Illuminate\Auth\Middleware\RequirePassword::class,
-        'signed' => \Illuminate\Routing\Middleware\ValidateSignature::class,
+        'signed' => \App\Http\Middleware\ValidateSignature::class,
         'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
         'verified' => \Illuminate\Auth\Middleware\EnsureEmailIsVerified::class,
     ];