mds: update cephfs octopus feature bit
2020-02-06 After discussion at the CDM, we will stop naming releases for the CephFS min_compat_client bits. The operator will also stop setting a min compatible release. (ceph fs set ... min_compat_client <release>)
Instead, the operator can set/unset individual features via a new API like
ceph fs client_feature_set <fs_name> "reclaim" ceph fs client_feature_unset <fs_name> "reclaim" ceph fs dump ... client_features reclaim,deleg_ino
Add matrix to the docs with feature bits and first release they came out.