Undocument nonexistent functions (mysql_{start,stop}_slave).

@item @strong{mysql_shutdown()} @tab

Shuts down the database server.

@item @strong{mysql_start_slave()} @tab

Starts slave replication thread.

@item @strong{mysql_stat()} @tab

Returns the server status as a string.

@item @strong{mysql_store_result()} @tab

Retrieves a complete result set to the client.

@item @strong{mysql_stop_slave()} @tab

Stops slave replication thread.

@item @strong{mysql_thread_id()} @tab

Returns the current thread ID.