Closes gh-17877

* gh-16973:
  Polish "Allow the user that runs the app to be specified via an env var"
  Allow the user that runs the app to be specified via an env var

Closes gh-16973

See gh-16973

See gh-16973

Closes gh-18298

* gh-18285:
  Test custom comment prefix with one that does not work by default

Closes gh-18285

See gh-18285

Closes gh-18297

* gh-18289:
  Fix typo in configuration metadata appendix

Closes gh-18289

See gh-18289

Closes gh-18289

Update the build to use a shared spring-doc-resources URL
rather than repeating it multiple times.

See gh-18293

Closes gh-18006

Closes gh-18296

* pr/18295:
  Polish "Fix typo in logback example"
  Fix typo in logback example

Closes gh-18295

See gh-18295

See gh-18295

See gh-18293

Refactor the `org.springframework.boot.actuate.context` package
with the following changes:

- Deprecate several classes which would ideally be internal

- Replace `ConfigurationBeanFactoryMetadata` with a new
  `ConfigurationPropertiesBean` class to better reflect that we no
  longer maintain meta-data directly.

- Use constructor injection and final fields whenever possible

- Rename `ConfiguraionPropertiesBeanDefinition` to
  `ConfigurationPropertiesValueObjectBeanDefinition` to align
  with the binder changes made in commit 0b3015e4

- Add additional tests

Closes gh-16903

See gh-18293

This commit warns developers about the fact that plugging RSocket into
an existing web server is only possible with Reactor Netty web servers.
RSocket itself is using Reactor Netty, so this is why we can plug an
RSocket over websocket handler in an existing Reactor Netty handler.

This feature is not possible with other web servers, as existing APIs do
not make that possible.

Fixes gh-17494

Closes gh-18265

After a change in Spring Framework (see
spring-projects/spring-framework#23314), the `RouteMatcher` to be used
with the RSocket infrastructure is configured on the `RSocketStrategies`
directly.

This commit moves the auto-configuration of the
`PathPatternRouteMatcher` from the message handling parts to the RSocket
strategy one.

Closes gh-17571

* gh-16091:
  Polish "Support zip64 jars"
  Support zip64 jars

Closes gh-16091

See gh-16091

See gh-16091

Closes gh-17234

* pr/18288:
  Fix a broken Asciidoctor syntax

Closes gh-18288

Along the way, this commit also fixes a typo.

See gh-18288

Fixes gh-18278

Closes gh-17008

Closes gh-18283

* pr/18270:
  Fix pre-defined logging group documentation

Closes gh-18270

See gh-18270

* pr/18281:
  Polish

Closes gh-18281

See gh-18281