* context-close:
  Close the context in TypeExcludeFilterTests

Closes gh-5672

* patch-50:
  Remove a test doing nothing

Closes gh-5673

* pull5667:
  Fix potential NPE in RedisAutoConfiguration

Closes gh-5667

* pull5053:
  Make UserInfoTokenServices.getPrincipal protected

Update UserInfoTokenServices.getPrincipal() so that it can be overridden
by subclasses to allow a custom authenticated principal to be returned
from the authorized request parameters.

Fixes gh-5053

Update RelaxedDataBinder.extendCollectionIfNecessary to use the current
index when checking if the path node is an array.

Fixes gh-5635

Update CentralDirectoryParser to reduce the number of objects created
when parsing the central directory. A single CentralDirectoryFileHeader
object is now reused as entries are parsed.

Fixes gh-5260

Update tests that use `doWithBlockedPort` so that the port is obtained
and bound early to ensure that something else doesn't grab it.

When spring-boot-docs is built on Windows, Maven logs a warning:

[WARNING] The POM for org.crashub:crash.shell:jar:1.3.2 is invalid,
transitive dependencies (if any) will not be available, enable debug
logging for more details

The build then fails as a class in crash.cli, a dependency of
crash.shell, is unavailable. The failure’s due to a hardcoded path
in the pom that Maven needs to be absolute and isn’t on Windows. See
https://jira.exoplatform.org/browse/CRASH-247 for details.

This commit works around the problem by explicitly declaring
crash.shell’s one dependency directly. The warning is still logged but
it’s now benign.

Closes gh-5633

5e0ba6ea added support for reading a jar manifest's Class-Path
attribute when resolving changeable URLs from a URLClassLoader,
however it did not handle relative URLs, i.e. URLs without a protocol,
correctly.

This commit updates ChangeableUrls so that it uses the URL of the
JAR that contains the manifest as the base for any new URLs that
are created. When the Class-Path entry is relative, this base will
be used. When the Class-Path entry is absolutee, URL's constructor
will ignore the supplied base.

Closes gh-5665

* gh-5324:
  Polish "Allow Jetty's ThreadPool to be customized" (gh-5324)
  Allow Jetty's ThreadPool to be customized

This commit enhances JettyEmbeddedServletContainerFactory to allow
Jetty to be created with a custom ThreadPool via a new
setThreadPool(ThreadPool) method.

Closes gh-5324

* pr/5661:
  Polish

Closes gh-5661

Closes gh-5566

The ServerConnector class doesn’t exist in Jetty 8 so we have to
resort to reflection to create and configure a SelectChannelConnector
instead.

Closes gh-5649
See gh-5380

Acceptors and Selectors aren't supported with Jetty 8.

See gh-5380

* issue-5380-fix:
  Add Jetty `acceptors` and `selectors` support

Add support for Jetty `acceptors` and `selectors` configuration, either
directly on the `JettyEmbeddedServletContainerFactory` or via
`server.jetty.acceptors`/`server.jetty.selectors` server properties.

Fixes gh-5380
Closes gh-5649

Fix accidental regression introduced when I tweaked the updated
banner support (commit aaed87d1).

See gh-5636

* add_banner_bean:
  Register printed banner in ApplicationContext

Update SpringApplication to store the banner that was actually printed
as a bean named `springBootBanner`.

Closes gh-5636