Not include mailing lists in revisions search

Summary: Neither author nor reviewer can be a mailing list.

Test Plan: /differential/filter/revisions/, saw "Type a user name".

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4722

src/applications/differential/controller/DifferentialRevisionListController.php

@@ -363,7 +363,7 @@ final class DifferentialRevisionListController extends DifferentialController {
           array_select_keys($handles, $params['participants']),
           'getFullName');
         return id(new AphrontFormTokenizerControl())
-          ->setDatasource('/typeahead/common/allmailable/')
+          ->setDatasource('/typeahead/common/accounts/')
           ->setLabel($label)
           ->setName('participants')
           ->setValue($value);