- MessageBatch: added replace() and remove(), removed method with index (set(), get())
- Not bundling unicast messages whose dest is a physical address
- Removing messages not added to the receiver table from the message list (https://issues.jboss.org/browse/JGRP-1593)
- Messages whose dest is a physical address are marked as DONT_BUNDLE, so they don't get sent as multicast by the bundler
- Set rejection_policy to "discard" by default
- Implemented up(MessageBatch) in ProtocolStack and JChannel