Summary: Ref T13008. We haven't hit any issues with this, but I can imagine we might in the future. When one host makes an intracluster request to another host, the `$viewer` ends up as the omnipotent viewer. This viewer isn't logged in, so they'll currently accumulate rate limit points at a high rate. Instead, don't give them any points. These requests are always legitimate, and if they originated from a user request, that request should be the one getting rate limited. Test Plan: Browsed around. Reviewers: amckinley Reviewed By: amckinley Maniphest Tasks: T13008 Differential Revision: https://secure.phabricator.com/D18708