/** Sets the channel topic.
* @param user The user setting the topic.
* @param topic The topic to set it to.
+ * @param topicts Timestamp of the new topic.
+ * @param setter Setter string, may be used when the original setter is no longer online.
+ * If omitted or NULL, the setter string is obtained from the user.
*/
- void SetTopic(User* user, const std::string& topic);
+ void SetTopic(User* user, const std::string& topic, time_t topicts, const std::string* setter = NULL);
/** Obtain the channel "user counter"
* This returns the number of users on this channel