Summary: Ref T4786. This doesn't fully fix the issue since there's no way to make channels public yet, but gets some of the infrastructure more up to date. - Allow public access to the list and log controllers. - Implement proper policy checks in the Events (this has no practical impact on the only controller that loads this stuff, it's just for general/future purposes). - Remove a old-style unused method for building page frames. Test Plan: Viewed log list and log details as logged-in and logged out users. Reviewers: btrahan Reviewed By: btrahan Subscribers: epriestley Maniphest Tasks: T4786 Differential Revision: https://secure.phabricator.com/D8746