* Add beginShutdown() and endShutdown() to OrderlyShutdownCapable
* JMS/AMQP stop listener containers
* TCP (server side)
** after beginShutdown() disallow new connections, drop (log) new messages
** after endShutdown() close server socket
* HTTP (server side)
** after beginShutdown() disallow any new requests (503 Service Unavailable)
* Docbook updates
** What's new section
** Orderly Shutdown section.
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