I has been my experience that something has changed with this
release: On certain (all?) listowner commands issued with a simple
wildcard aka ASTERISK where an RFC822 address would be used, then instead
of the local node, all nodes are assumed e.g.,
SET listname NOMAIL FOR *
used to mean "just" userids at the list-owner's node. Now it means all
userids at all nodes (*@*).