Here is the situation:
* GitLab server on debian jessie. Updated to 8.2, running fine for about 2 years now.
* Mattermost test installation using the v1.2.1 .tar.gz from the download page
Using the Mattermost System Console and following the instructions there i managed to "Enable Sign Up With GitLab". Works fine.
This however doesn't seem to do more than handle exactely that.
So what do i need to do to get the cool stuff working?