Collaboration between Symfony security team and Drupal security team

This topic has come up in the past at some events, within the security team and on drupal.org. Symfony project founder Fabien Potencier posted a proposal for dealing with downstream projects (such as Drupal) at
https://github.com/symfony/symfony-docs/pull/2639/files

This agreement will have an impact on how efficiently and how quickly the Drupal security team can work with the Symfony security team to coordinate security releases in a timely manner. Let's discuss this on github so Symfony and the other projects can be kept in the loop.