using -b 0.0.0.0 does the following bindings:

jboss.bind.address=0.0.0.0

bind.address=<hostname>

-Djboss.bind.address=0.0.0.0 does the following:

jboss.bind.address=0.0.0.0

Whereas I could understand jboss.bind.address is used by JBoss to bind it's services to all IPs available on the machine, what does bind.address=<hostname> do?