HUP unicorns after upgrade
At the moment we stop and restart services after an upgrade: https://gitlab.com/gitlab-org/omnibus-gitlab/blob/master/files/gitlab-ctl-commands/upgrade.rb#L56-60
Meaning there would be a downtime as services are stopped. Is it possible to stop :all_the_things: but unicorns, and HUP this separately? Or is there a reason not to do so?