fix mail handler for conpherence try 2

Summary: the editor methods are protected so just build a reply handler directly

Test Plan: push it live and try again

Reviewers: epriestley, chad

Reviewed By: chad

CC: aran, Korvin

Maniphest Tasks: T2399

Differential Revision: https://secure.phabricator.com/D4670

src/applications/metamta/storage/PhabricatorMetaMTAReceivedMail.php

@@ -290,9 +290,8 @@ final class PhabricatorMetaMTAReceivedMail extends PhabricatorMetaMTADAO {
       $handler = PhabricatorAuditCommentEditor::newReplyHandlerForCommit(
         $receiver);
     } else if ($receiver instanceof ConpherenceThread) {
-      $handler = id(new ConpherenceEditor())
-        ->setActor($user)
-        ->buildReplyHandler($receiver);
+      $handler = id(new ConpherenceReplyHandler())
+        ->setMailReceiver($receiver);
     }
 
     $handler->setActor($user);