INT-2515 More Orderly Shutdown

* 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.

src/reference/docbook/jmx.xml

@@ -421,6 +421,19 @@
 				seconds).
 			</para>
 		</section>
+		<section id="jmx-mbean-shutdown">
+			<title>Orderly Shutdown Managed Operation</title>
+
+			<para>
+				The MBean exporter provides a JMX operation to shut down the application
+				in an orderly manner, intended for use before terminating the JVM.
+			</para>
+			<programlisting language="java"><![CDATA[public void stopActiveComponents(boolean force, long howLong)
+]]></programlisting>
+			<para>
+				Its use and operation are described in <xref linkend="jmx-shutdown"/>.
+			</para>
+		</section>
 	</section>
 </section>