Configure a MySQL replication slave with information about the master.
url: Connection url.
master_hostname: Host name or address of the Replication Master.
replication_username: The name of the user account which will perform replication.
replication_password: Password for the replication user.
--log-name: Recorded binary log file name. Can be omitted when the master has not yet been started with biary logging enabled.
--log-position: Recorded binary log file position. Can be omitted when the master has not yet been started with biary logging enabled.