Port a few various options.
Summary:
- remarkup.enable-embedded-youtube
- controller.oauth-registration
- aphront.default-application-configuration-class
- cache.enable-deflate
Test Plan: Saw the new options in the web interface.
Reviewers: epriestley, chad, btrahan
Reviewed By: epriestley
CC: aran, Korvin
Maniphest Tasks: T2255
Differential Revision: https://secure.phabricator.com/D4424