Allow setting `usage_ping_enabled` in `gitlab.rb`
This setting is passed through to the Rails app, and defaults to true. Setting it to false:
- Disables the usage ping.
- Prevents the usage ping from being enabled through the admin panel. It can
only be enabled by either removing the line from
gitlab.rb
and configuring through the admin panel, or setting it to true ingitlab.rb
.
CE MR: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/11231
Marked as WIP until that is merged.