Remove admin requirement from MetaMTASendGridReceiveController

Summary:
This got caught in the crossfire when we admin-only'd the whole MetaMTA tool. It
should not be admin only.

(Generally, we should probably separate this out better at some point.)

Test Plan: Hit /mail/sendgrid/ as a logged-out, non-admin user (like SendGrid
does).

Reviewers: s, btrahan

Reviewed By: s

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D1588

Author: epriestley

src/applications/metamta/controller/sendgridreceive/PhabricatorMetaMTASendGridReceiveController.php

@@ -1,7 +1,7 @@
 <?php
 
 /*
- * Copyright 2011 Facebook, Inc.
+ * Copyright 2012 Facebook, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,6 +23,10 @@ public function shouldRequireLogin() {
     return false;
   }
 
+  public function shouldRequireAdmin() {
+    return false;
+  }
+
   public function processRequest() {
 
     // No CSRF for SendGrid.