Add buttons to delete or free tasks from the queue

Summary: See T709. I also ran into a case in Drydock where this is useful for
testing/development.

Test Plan: Freed lease of a task; deleted a task.

Reviewers: btrahan, jungejason

Reviewed By: btrahan

CC: aran, epriestley

Maniphest Tasks: T709

Differential Revision: https://secure.phabricator.com/D1469

src/aphront/default/configuration/AphrontDefaultApplicationConfiguration.php

@@ -259,6 +259,8 @@ class AphrontDefaultApplicationConfiguration
 
       '/daemon/' => array(
         'task/(?P<id>\d+)/$' => 'PhabricatorWorkerTaskDetailController',
+        'task/(?P<id>\d+)/(?P<action>[^/]+)/$'
+          => 'PhabricatorWorkerTaskUpdateController',
         'log/' => array(
           '$' => 'PhabricatorDaemonLogListController',
           'combined/$' => 'PhabricatorDaemonCombinedLogController',