Ceph

Currently we have semi-flat hierarchy. We have global section, section per entity type and section per entity. The var resolution then goes from section -> entity type -> global. Instead we can have a more flexible generic hierarchy, where we'd define some separator ('.' is probably the best, as it's consistent with the previous scheme), and then var resolution would try to find the larger prefix match (and end and the global section). E.g., for x.y.z we'd go [x.y.z] -> [x.y] -> [x] -> global