Disable TLS 1.0 and 1.1 for NGINX and PostgreSQL
As part of our TLS Everywhere initiative, @stanhu suggested that TLS 1.0 and 1.1 options can be disabled on NGINX and PostgreSQL. Relevant issue:
https://gitlab.com/gitlab-com/gl-security/engineering/issues/206
/cc @joshlambert
Edited by Kathy Wang