Closes gh-22871

Closes gh-22870

Closes gh-22869

Closes gh-22868

Closes gh-22867

Closes gh-22866

Closes gh-22865

Closes gh-22864

Closes gh-22863

Closes gh-22862

Closes gh-22861

Closes gh-22860

Closes gh-22859

With the upgrade to the new Couchbase SDK and the related changes in
Spring Data Couchbase, CacheManagerCustomizer can no longer be used to
customize the Couchbase cache manager as it is an immutable class.

This commit introduces a dedicated callback for the
CouchbaseCacheManagerBuilder that is used by the auto-configuration and
update the documentation to refer to it with a sample usage.

Closes gh-22573

Closes gh-22615

Previously, UrlPathHelper's full path optimization was enabled when
there was a dispatcher servlet mapped to /. The UrlPathHelper is used
across Spring MVC and if there are multiple dispatcher servlets they
all share the sample UrlPathHelper. This meant that any additional
dispatcher servlets mapping to locations other than / would not be able
to map requests correctly as the UrlPathHelper would use the full path,
ignoring the url mapping of the dispatcher servlet.

This commit updates the MVC auto-configuration so that use of the full
path is only enabled if there's a single dispatcher servlet
registration.

Fixes gh-22682

Closes gh-22849

* pr/21615:
  Polish "Migrate legacy endpoint that have a dash in their id"
  Migrate legacy endpoint that have a dash in their id

Closes gh-21615

See gh-21615

See gh-21615

Closes gh-22847

* pr/22777:
  Polish "Propagate the cause that led Reactor"s debug agent to fail"
  Propagate the cause that led Reactor"s debug agent to fail

Closes gh-22777

See gh-22777

Prior to this commit, DebugAgentEnvironmentPostProcessor throws a
RuntimeException with a generic error message if its initialization
fails. The causing exception is discarded, which makes error analysis
unnecessarily difficult.

This commit attaches the cause to the newly thrown RuntimeException.

See gh-22777

Closes gh-22841

* pr/22760:
  Fix wrong reference in `ReadinessStateHealthIndicator` javadoc

Closes gh-22760

See gh-22760

See gh-22844

See gh-22843

See gh-22842

See gh-22841

Previously, the Maven plugin integration tests used a settings.xml file
that defined https://repo.spring.io/snapshot as a repository. This
allowed them to resolve snapshots of the plugin's Spring Framework
dependencies but it had the unfortunate side-effect of also allowing
them to resolve snapshots of other Spring Boot modules from Artifactory
rather than using those currently being built.

This commit replaces the repositories in settings.xml with a Gradle
task that resolves the necessary dependencies and populates a local
repository with the dependencies' jars and pom files. This is achieved
using a ComponentMetadataRule that creates a custom variant of each
dependency that includes its pom file, inspired by the example in
gradle/gradle/#11449. A configuration that extends the
runtimeClasspath configuration and select the custom variant via its
attribute is then used to resolve the jars and pom files of the runtime
classpath such that they can then be used to populate the local
repository.

Closes gh-22828

Prior to this commit, the HTTP/2 server auto-configuration for Jetty
would require Conscrypt as a hard dependency.

This commit updates the auto-configuration for more flexibility and now
allows the following deployments:

* JDK9+ with the JDK ALPN implementation
* JDK8u252+ with the backported ALPN implementation
* Conscrypt with no JDK requirement

The auto-configuration now improves detection and guides developers in
case there is a missing `jetty-alpn-*-server` dependency.

The reference docs in the HOWTO section has been updated accordingly.

Closes gh-22188

Closes gh-22819

Previously, the project version was included in the name of the
Ant-built jar and the integration test assumed that there would be a
single jar in the output directory. This assumption did not hold true
if the project's version had changed and the project had been built
again without a clean. This resulted in two jars, one for the previous
version and one for the current version, in the output directory. This
caused a test failure.

This commit updates the build.xml to remove the version from the name
of the Ant-built jar and updates the integration test to find it.

Closes gh-22782

Closes gh-22780

Closes gh-22774