R1:32d2395a4549

Unify links to www.phabricator.com and phabricator.com

Test Plan:
scripts/sql/upgrade_schema.php

Verify links at /directory/2/.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran

Maniphest Tasks: T1096

Differential Revision: https://secure.phabricator.com/D2172