Issue: SPR-15803

When the input stream is a JSON array the tokenizer skips over the
start and end array tokens in order to decode into an array of
top-level objects. However in this mode it also skips over nested
start and end array tokens which prevents proper parsing of JSR-310
dates (represented with an array syntax) as well as any fields that
are collections.

Issue: SPR-15803

The method was orginally added under SPR-14547 but the example in it
was probably intended for use with Content-Disposition server response
header (file dowonload) and not for a Content-Disposition header
within the body of a multipart request.

In a Spring application a multipart request is typically serialized
by the FormHttpMessageConverter and hence the Content-Disposition is
not explicitly set by the application.

Issue: SPR-15205

This commit parses the "Host" HTTP request header as an
`InetSocketAddress`, while supporting IPv6 addresses like `[::1]`.

This host string contains `:` chars even though it has no port
information.

Issue: SPR-15799

StandardMultipartHttpServletRequest now properly decodes RFC-5987
encoded filenames (i.e. filename*) by delegating to ContentDisposition
and also support RFC-2047 syntax through javax.mail MimeUtility.

Issue: SPR-15205

Issue: SPR-15798

Issue: SPR-15797

Issue: SPR-15673

This commit updates BeanUtils class in order to add Kotlin optional
parameters with default values support to the immutable data classes
support introduced by SPR-15199.

Issue: SPR-15673

Prior to this commit, the host+port information of the incoming request
where taken from the remoteAddress, which is actually the socket address
of the HTTP client (i.e. not the server).

This commit resolves this information from the "Host" HTTP request
header, if available, or the actual local address of the channel if no
header is available.

Issue: SPR-15084

Issue: SPR-15779

Issue: SPR-15786

Issue: SPR-15720
Issue: SPR-15792

Issue: SPR-15717

Add an option for ForwardedHeaderFilter to only process the
HttpServletRequest. This means that HttpServletResponse.sendRedirect will
only work when the application is conifgured to use relative redirects
using Servlet Container specific setup.

Issue: SPR-15717

Issue: SPR-15782

Issue: SPR-15720
Issue: SPR-15792

Issue: SPR-15793

This commit ensure that null-safety is consistent between
getters and setters in order to be able to provide beans
with properties with a common type when type safety is
taken in account like with Kotlin.

It also add a few missing property level @Nullable
annotations.

Issue: SPR-15792

Issue: SPR-15755

Issue: SPR-15720

Issue: SPR-15791

Since there is no reason for an exchange to ever complete without a
ClientResponse I've added a switchIfEmpty check at the WebClient level.

Also, temporarily a second check closer to the problem in the
ReactorClientHttpConnector suggesting a workaround and providing a
reference to the Reactor Netty issue #138.

Issue: SPR-15784

Issue: SPR-15785

Issue: SPR-15773

Collapse the base interface VersionPathStrategy into its extension
VersionStrategy and then turn the prefix nad fliename based
implementations into abstract base classes (vs delegate strategies).

It is simpler to have one VersionStrategy hierarchy vs that plus a
separate VersionPathStrategy as a delegate. In practice each
VersionStrategy is suited to be prefix or filename based. Also none
of our code cares about the distinction between those two interfaces.

Issue: SPR-15787

Since `PathPattern.combine` now returns another `PathPattern` instance
(it was previously returning a String instance), we can now safely
remove the parser instance included in `PatternsRequestCondition`.

Issue: SPR-15663