Subscribes the client to the specified channels.
Once the client enters the subscribed state it is not supposed to issue any
other commands, except for additional SUBSCRIBE, PSUBSCRIBE, UNSUBSCRIBE
and PUNSUBSCRIBE commands.
Subscribes the client to the specified channels.
Once the client enters the subscribed state it is not supposed to issue any
other commands, except for additional SUBSCRIBE, PSUBSCRIBE, UNSUBSCRIBE
and PUNSUBSCRIBE commands.