------------
- [x] ensure that `SERVER_X` is defined
-- [ ] change any features `DEPRECATED` in release X-3 are now marked `RETIRED`.
+- [x] change any features `DEPRECATED` in release X-3 are now marked `RETIRED`.
- [ ] look for features that (1) were present in X-2 and (2) have no
client dependency and mark them `DEPRECATED` as of X.
Code cleanup
------------
-- [ ] search code for "after X-1" or "X" for conditional checks
-- [ ] search code for X-2 and X-3 (`CEPH_FEATURE_SERVER_*` and
+- [x] search code for "after X-1" or "X" for conditional checks
+- [x] search code for X-2 and X-3 (`CEPH_FEATURE_SERVER_*` and
`ceph_release_t::*`)
- [ ] search code for `require_osd_release`
- [ ] search code for `min_mon_release`
-- [ ] check include/denc.h if DENC_START macro still needs reference to squid
+- [x] check include/denc.h if DENC_START macro still needs reference to squid
QA suite
--------