R1:1bff43a0c3d9

Mask a couple more config keys

Summary: This config controls which values are masked in darkconsole. Mask a couple more vaguely-secret values.

Test Plan: Looked at darkconsole "Config" tab.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D1845