Ceph » rgw

(1) following documents should be update with the need that "rgw_enable_apis" should contain: "notifications".
https://docs.ceph.com/en/latest/radosgw/notifications/
https://docs.ceph.com/en/latest/radosgw/pubsub-module/

(2) "notifications" should be added to the list of default values here:
https://docs.ceph.com/en/latest/radosgw/config-ref/#ceph-object-gateway-config-reference

(3) the value "notifications" should be added to the RGW code, here (in addition to "pubsub" to preserve compatibility):
https://github.com/ceph/ceph/blob/master/src/rgw/rgw_main.cc#L384
should be:

const bool pubsub_enabled = apis_map.count("pubsub") > 0 || apis_map.count("notifications") > 0;