Add a bash minimal version requirement.
Add a bash minimal version requirement.

Associative arrays are available after bash 4.

root-mirror/root,karies/root,root-mirror/root,olifre/root,karies/root,karies/root,olifre/root,olifre/root,karies/root,karies/root,karies/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,root-mirror/root,karies/root,olifre/root,karies/root,root-mirror/root,olifre/root,karies/root,root-mirror/root,olifre/root,olifre/root,karies/root,root-mirror/root,root-mirror/root,root-mirror/root,olifre/root,karies/root,olifre/root