"Enable SMTP Authentication:" option missing from /etc/gitlab/gitlab.rb

Summary

Hello, I think there should be an option to configure the equivalent of "Use Authentication" for the SMTP portion of Gitlab Mattermost. I noticed it's missing and mail only works for me after I tick the "Enable SMTP Authentication:" box in the Mattermost system console.

Steps to reproduce

Setup mail in gitlab.rb

mattermost['email_enable_sign_up_with_email'] = false
mattermost['email_enable_sign_in_with_email'] = false
mattermost['email_enable_sign_in_with_username'] = false
mattermost['email_send_email_notifications'] = true
mattermost['email_require_email_verification'] = false
mattermost['email_smtp_username'] = "gitlab"
mattermost['email_smtp_password'] = "XXXXXXXXXXXXXXXXXXXXX"
mattermost['email_smtp_server'] = "localhost"
mattermost['email_smtp_port'] = "465"
mattermost['email_connection_security'] = "TLS"
mattermost['email_feedback_name'] = "Example Mattermost"
mattermost['email_feedback_email'] = "noreply@example.com"

See attached image of the Mattermost system console option which doesn't appear to have one in gitlab.rb