The idea is to publish on a "public" prefix anonymized objects and have a
priviledged prefix for non-anonymized ones. Currently only used for
Release and Revision objects.
This adds a "privileged" argument to KafkaJournalWriter.write_addition(s)
methods. If True, the topic used to send the message will be
instead of the default
On the client side, if both the privileged and unprivileged topics are
visible at subscritopn time, only the privileged topics will be
subscribed to for object types existing on both "channels".