[ROOT-7004] Reactivate inclusion of regex: it works on osx.
[ROOT-7004] Reactivate inclusion of regex: it works on osx.

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