The `IndexPrivilege#MANAGE_FOLLOW_INDEX_AUTOMATON` constant isn't updated to include the forget follower api. Also this text should say: `index privileges for the leader index.` instead of `index privileges for the follower index.`.    I also I wonder whether manage_follow_index is the right privilege here. Because this is about a leases for the follower index in the leader index. I don't know a good alternative here. I just wanted to mention this.