zfs: correctly apply selinux context
zfs: correctly apply selinux context

fixes #13858

Signed-off-by: Jörg Thalheim <f49f2a5e660787beb1d0033eaaa9f0d533955c60@higgsboson.tk>
(cherry picked from commit 19c31a703fb84f1079cc2466d435cb4913a4bfd2)

AdamOssenford/docker-pi,AdamOssenford/docker-pi,AdamOssenford/docker-pi