Document the security vulnerability reporting policy
Summary: Fixes T2791. I'm happy with HackerOne, so this pretty much just says "use HackerOne".
Test Plan:
{F128995}
- Clicked all the links.
Reviewers: btrahan, chad
Reviewed By: chad
Subscribers: epriestley
Maniphest Tasks: T2791
Differential Revision: https://secure.phabricator.com/D8538