``ceph-osd`` daemon after reverting to legacy values as the feature
bit is not perfectly enforced.
-.. _CRUSH - Controlled, Scalable, Decentralized Placement of Replicated Data: http://ceph.com/papers/weil-crush-sc06.pdf
+.. _CRUSH - Controlled, Scalable, Decentralized Placement of Replicated Data: https://ceph.com/wp-content/uploads/2016/08/weil-crush-sc06.pdf