postgres FDW cost estimation options unrecognized in 9.3-beta1

Greetings,
I have a postgresql-9.3-beta1 cluster setup (from the
yum.postgresql.org RPMs), where I'm experimenting with the postgres
FDW extension. The documentation (
http://www.postgresql.org/docs/9.3/static/postgres-fdw.html )
references three Cost Estimation Options which can be set for a
foreign table or a foreign server. However when I attempt to set
them, I always get an error that the option is not found:
#######
nightly=# show SERVER_VERSION ;
server_version
----------------
9.3beta1

nightly=# \des+
List of
foreign servers
Name | Owner | Foreign-data wrapper | Access privileges |
Type | Version |
FDW Options | Description
-----------+-----------+----------------------+-------------------+------+---------+----------
-----------------------------------------+-------------
cuda_db10 | lfriedman | postgres_fdw | |
| | (host 'cuda-db10', dbname 'nightly', port '5432') |
(1 row)

nightly=# ALTER SERVER cuda_db10 OPTIONS (SET use_remote_estimate 'true') ;
ERROR: option "use_remote_estimate" not found
#######

Am I doing something wrong, or is this a bug?

thanks