Disable Streaming Replication ==> Stop WAL Sender on master and WAL receiver on Slave

Hi all,

I read in pg mail archives that postgresql-9.1 release added support or
pausing and resuming (or disabling and enabling) streaming replication but
could not find any relevant configuration settings for achieving the same.

the closest that i could find so far are:

replication_timeout (integer) that stops replication connections that are
inactive (perhaps due to standby failure)
replication_timeout_action(enum) was mentioned in some mail archives but
not present in the current documentation.
pg_xlog_replay_pause() and pg_xlog_replay_resume() which just pauses the
recovery (or application of WAL contents) on the Standby but still let the
streaming replication continue (accumulate the WAL files on the Standby
with out applying those)

Interestingly, even in the documentation for pg_xlog_replay_pause, it was
written that

"If streaming replication is disabled, the paused state may continue
indefinitely without problem. While streaming replication is in progress
WAL records will continue to be received, which will eventually fill
available disk space, depending upon the duration of the pause, the rate of
WAL generation and available disk space"

But how do I disable streaming replication, with the effect that both WAL
sender on master and WAL receiver on slave gets stopped? Similarly, when I
enable streaming replication, the WAL sender and WAL receiver processes
would need to be started.

Could some one please explain the GUC settings or the SQL function calls
that help achieving this?

Thanks and Regards,
Samba