28f6bdc99b
Auto-exands numeric RF in CREATE/ALTER KEYSPACE statements for new DCs specified in the statement. Doesn't auto-expand existing options, as the rack choice may not be in line with current replica placement. This requires co-locating tablet replicas, and tracking of co-location state, which is not implemented yet. Signed-off-by: Tomasz Grabiec <tgrabiec@scylladb.com>