[Standards] A "broadcast" attribute to <messages/> ?

[Laurent Eschenauer]

>>> * headline -- [...] The receiving server SHOULD deliver the message to all
>>> of the recipient's available resources.HTH,

You agree that it should then be all resources having a positive
priority, in order to also comply with:
"However, the server MUST NOT deliver the stanza to an available
resource with a negative priority"
http://xmpp.org/rfcs/rfc3921.html#rules