Files uploaded into issues or other markdown pages should NOT have absolute urls
For example, on a gitlab 7.4.3 system, uploading an image into an issue, puts in an absolute url, like https:/192.168.1.1/uploads/group/project/commit/xyz.png. If we then try to move the gitlab installation to another machine (with a different name), all these uploads are gone. The same applies if we change from http to https.
The gitlab backup does carefully save and restore these files. So there should to be a proper gfm link for uploads like [uploads]/group/project/commit/xyz.png? ([file] does not support the uploads directory).
(edited to correct title)