phtize all the things

Summary: `pht`ize a whole bunch of strings in rP.

Test Plan: Intense eyeballing.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: hach-que, Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D12797

src/applications/conpherence/controller/ConpherenceUpdateController.php

@@ -208,7 +208,7 @@ final class ConpherenceUpdateController
           $response_mode = 'ajax';
           break;
         default:
-          throw new Exception('Unknown action: '.$action);
+          throw new Exception(pht('Unknown action: %s', $action));
           break;
       }