GitLab Geo: documentation changes for 8.6
Improved documentations for GitLab Geo (#76) in 8.6 release.
- Removed some limitations
- Added recommendation to try Geo with 8.6
- Changed link in admin screen to a valid one :)
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Improved documentations for GitLab Geo (#76) in 8.6 release.