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
Prior to this commit, the application availability infrastructure
would mix the `AvailabilityState`, the `HealthIndicator` and the
`HealthGroup` concepts and would not align with the rest.
This commit auto-configures the livenessState and readinessState
health indicators with the relevant configuration properties.
Unlike other indicators, they are not enabled by default but might
be in future versions.
This also moves the `management.health.probes.enabled` property
to `management.endpoint.health.probes.enabled` since "probes" here
is not a health indicator but rather a configuration flag for the
health endpoint.
Finally, the probes auto-configuration is refined to automatically
add liveness and readiness indicators for the probes group if
they're not already present.
Closes gh-22107
Previously, spring-boot-docs used the java-base-plugin and then added
configuration on top. This has proven to be error prone, with the most
recent problem being that the tests were not being compiled and run.
This commit changes approach and applies the java plugin to the project
instead of the java-base plugin. Now, rather than adding the necessary
configuration to the base, the unwanted pieces of the java plugin's
configuration – specifically the jar and javadoc tasks – are disabled
instead. The DeployedPlugin has also been updated so that it does not
create a publication from the java component for projects that have a
disabled jar task.
Closes gh-22284
