Gitlab forcing lowercase repo names

Created by: tbe

We just migrated a huge repository base from gitolite plain to gitlab. As gitlab forces lowercase names, and we have projects with mix-case names, the migration does break many configurations. Also we have the wired case, that we have two repositories only differing in some uppercase letters in the name. After the import, only the lowercase repository is available.

gitlab should allow the users to decide which way they name there repositories.

As unix file-systems ARE case sensitive, this behaviour could break thing in several ways, after importing repositories.