- command MUST NOT send the list of users, as private and secret
- channels cannot be seen by outside. In this case the returned
- name list MAY include a indication that the server could not
- resolve the names of the users on the channel. Also, in this case
- Client ID's or client modes are not sent either.
+ command MUST NOT send the list of users, but error is returned
+ to the sender, except if the sender is on the channel, or the
+ sender is server.