[Security-sig] Vulnerability table updated for Python 3.6.2

[Victor Stinner]

Hi,

I updated my vulnerability table for the Python 3.6.2 release:
http://python-security.readthedocs.io/vulnerabilities.html

I also added bpo-30730: "Environment variables injection in subprocess
on Windows".

Sadly, we missed to fix the "urllib FTP protocol stream injection"
vulnerability.

Victor