Closes gh-23972

Prior to this commit, the schemaZip Gradle task failed to find Spring
schema files on MS Windows due to path separators hard coded to forward
slashes that are not compatible with the Windows operating system.

Consequently, a full build failed on Windows since the distZip task was
not able to locate the zipped schema archive that the schemaZip task
failed to create.

This commit fixes this by updating the schemaZip task to search for
schema files using backslashes as well as forward slashes.

Closes gh-23933

Closes gh-23409

Closes gh-23956

This commit notifies the Synchronoss listener that the buffer stream
has ended.

Closes gh-23768

(cherry picked from commit bf36f49d)

This commit notifies the Synchronoss listener that the buffer stream
has ended.

See gh-23768

Closes gh-23908

Previously fixed in 5.2 via d46359. Now also backported to 5.1.x.

Closes gh-23909

Changes introduced in commit 9b208761
caused a regression for Cookie support in MockHttpServletResponse.
Specifically, an Expires attribute that cannot be parsed using
`ZonedDateTime.parse()` now results in an exception; whereas,
previously an entry such as `Expires=0` was allowed.

This commit fixes this issue in MockCookie by catching and ignoring any
DateTimeException thrown while attempting to parse an Expires attribute.

Closes gh-23911

Closes gh-23907

Closes gh-23924

Closes gh-23775

See gh-23884

Prior to this commit, the `DateFormatterRegistrar` would register the
annotation-based formatter before the pattern-based formatter. This
would create an issue when an application tries to convert a `String` to
an annotated `@DateTimeFormat Date`: since the converters are considered
in reversed order of registration in
`GenericConversionServicei#ConvertersForPair`, the pattern-based variant
would always be considered before the annotation-based variant,
overriding the developer's opinion.

This commit aligns the `DateFormatterRegistrar` with the
`DateTimeFormatterRegistrar` and registers the annotation-based variant
last.

Closes gh-23896

Closes gh-23879

Prior to this commit, if MockServletContext was configured with a
FileSystemResourceLoader, invocations of the following methods on a
Microsoft Windows operating system resulted in an InvalidPathException
if the supplied path contained a colon (such as "C:\\temp"). This is
inconsistent with the behavior on non-Windows operating systems. In
addition, for comparable errors resulting in an IOException, those
methods (except getRealPath()) return null instead of throwing the
exception.

- getResourcePaths()
- getResource()
- getResourceAsStream()
- getRealPath()

This commit makes handling of InvalidPathException and IOException
consistent for these methods: both exceptions now result in null be
returned by these methods.

Closes gh-23717

A ResponseStatus exception now exposes extra method to return headers
for the response. This is used in ResponseStatusExceptionHandler to
apply the headers to the response.

Closes gh-23741

Closes gh-23793

Latest applicable dependency updates (Tomcat 9.0.27, Undertow 2.0.27, RxJava 2.2.13, Hibernate ORM 5.3.13, POI 4.1.1, Checkstyle 8.26)

See gh-23747

Closes gh-23794

See gh-23769

At present, MockCookie doesn't preserve expires attribute. This has a
consequence that a cookie value set using
MockHttpServletResponse#addHeader containing an expires attribute will
not match the cookie value obtained from
MockHttpServletResponse#getHeader, since the expires attribute will get
calculated based on current time.

This commit enhances MockCookie to preserve the expires attribute.

Closes gh-23769

- Add maxInMemorySize property to Decoder and HttpMessageReader
  implementations that aggregate input to trigger
  DataBufferLimitException when reached.

- For codecs that call DataBufferUtils#join, there is now an overloaded
  variant with a maxInMemorySize extra argument. Internally, a custom
  LimitedDataBufferList is used to count and enforce the limit.

- Jackson2Tokenizer and XmlEventDecoder support those limits per
  streamed JSON object.

- Configurable limits for multipart requests with Synchronoss NIO.

- Centralized maxInMemorySize exposed via CodecConfigurer along with
  ability to plug in an instance of MultipartHttpMessageWrite.

Closes gh-23884

Closes gh-23870

See gh-23870

Closes gh-23780

Closes gh-23777

See gh-23803

Make use of the new getAvailableExtensionNames() method.

Closes gh-23799