Summary: Ref T4340. If you don't configure a CDN and visit a custom site (like a Phame blog site, or a CORGI sandbox internally) we serve resources from the main site. This violates the Content-Security-Policy. When there's no CDN, include the primary domain in the CSP explicitly. Test Plan: Loaded `local.www.phacility.com`, got resources. Maniphest Tasks: T4340 Differential Revision: https://secure.phabricator.com/D19170