Detaches a subscription from a topic.
subscriptions_detach(subscription)logical, TRUE if successfully detached
character, Subscription Required, subscription name or instance of
a Subscription object
Other Subscription functions:
subscriptions_ack(),
subscriptions_create(),
subscriptions_delete(),
subscriptions_exists(),
subscriptions_get(),
subscriptions_list(),
subscriptions_modify_ack_deadline(),
subscriptions_modify_pushconf(),
subscriptions_patch(),
subscriptions_pull(),
subscriptions_seek()