Node:async-new-recipient, Next:async-sub-recipient, Previous:async-new-text, Up:Asynchronous Messages
        async-new-recipient [16] (( text-no     :   Text-No;
                                    conf-no     :   Conf-No;
                                    type        :   Info-Type ));
This message indicates that a new recipient has been added to text
text-no.  The recipient added is conf-no and the type of
recipient is indicated by type.  This message is sent to all
recipients of the text that are permitted to know about the new
recipient.