As someone reporting vulnerabilities, I want up-to-date information about how to do so

[afeld]

Need to go through and clean/update the documentation:

• https://hackerone.com/tts
• https://18f.gsa.gov/vulnerability-disclosure-policy/
• https://handbook.18f.gov/responding-to-public-disclosure-vulnerabilities/
• https://insite.gsa.gov/topics/information-technology/security-and-privacy/it-security/report-it-security-incidents-and-suspicious-activity-immediately

cc #33

[afeld]

Just did a bit of cleanup of the HackerOne Policies.

[afeld]

Dupe of #49.