- Improved exception handling during shutdown
- Refactored LinkedList / LinkedListNode to use generics
- Refactored PublishedItem to remove persistence-specific retry attribute
- Added RetryWrapper to improve pubsub item persistence

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@13651 b35dd754-fafc-0310-a699-88a17e54d16e