Issue: SPR-12324

The WebSocketMessageBroker config now allows wrapping the
SubProtocolWebSocketHandler to enable advanced use cases that may
require access to the underlying WebSocketSession.

Issue: SPR-12314

Issue: SPR-12314

Issue: SPR-12301

This change adds a new XhrTransport for the SockJs client
implementation. This transport is based on `UndertowClient`,
Undertow's HTTP client.

Note that this transport can be customized with an OptionMap that is
used by the Xnio worker backing the I/O communications (see
http://xnio.jboss.org).

Implementation tested with undertow 1.0.36, 1.1.0.RC3, 1.2.0.Beta1.

Issue: SPR-12008

This change adds a "Vary: Origin" HTTP response header for /info and
/iframe SockJS endpoints.
This is preventing proxies and browsers from caching a response and
reusing it for an invalid Origin.

Reference: https://groups.google.com/forum/#!topic/sockjs/svsLWRorSis

Issue: SPR-12310

Issue: SPR-12313

This commit adds support for direct Jackson mix-in annotations registration in
Jackson2ObjectMapperFactoryBean and Jackson2ObjectMapperBuilder.

Issue: SPR-12144

Issue: SPR-12308

Issue: SPR-12311

TextMessage.toString() does not throw StringIndexOutOfBoundsException for payload with multibyte characters

Issue: SPR-12307

Issue: SPR-12306

Comprehensive revision of SpEL's bytecode generation and number handling (BigInteger support, doubleValue fallback)

Issue: SPR-9913

Issue: SPR-12280

Issue: SPR-12299

Issue: SPR-12297

Issue: SPR-12250

JavaMailSenderImpl catches Exception instead of MessagingException and checks for reconnect in case of message batches

Issue: SPR-12298

This commit changes email addresses and URLs so that they point to
pivotal.io instead of gopivotal.com.

Also includes varargs declaration for applicable send methods.

Issue: SPR-12294

AbstractMessageChannel triggers afterSendCompletion with previously resolved non-null Message in case of preSend returning null

Issue: SPR-12295

Issue: SPR-12292

Issue: SPR-12280

Issue: SPR-12285

Prior to this commit, the getter methods in MockServletContext threw an
UnsupportedOperationException when trying to retrieve Servlet and
Filter registrations.

This commit improves the behavior of these methods by returning null
when a single registration is requested and an empty map when all
registrations are requested. This is now in line with the Javadoc for
ServletContext. Note, however, that the corresponding setter methods
still throw UnsupportedOperationExceptions which is suitable behavior
for a mock.

Issue: SPR-12290

* typofix:
  fix typo

The ternary expression node was failing to generate the
necessary unboxing bytecode when the condition part
of the expression returned a boxed Boolean rather than
a primitive boolean.

Also fixed here is an IllegalAccessError that was
seen in the same expression due to generating a
CHECKCAST bytecode for a private type.

Issue: SPR-12271

Issue: SPR-12282

* SPR-12239:
  Adding @AjSuppressWarnings on some advices

Issue: SPR-12239

Issue: SPR-12243