This commit removes the following deprecated properties:

* `server.connection-timeout`
* `server.use-forward-headers`
* `server.jetty.max-http-post-size`
* `server.tomcat.max-http-post-size`

Closes gh-20991

Update `SpringBootContextLoader` so that it correctly deals with an
`@ActiveProfiles` annotation that contains a comma.

Fixes gh-19537
Co-authored-by: Scott Frederick <sfrederick@pivotal.io>
Co-authored-by: Andy Wilkinson <awilkinson@pivotal.io>

Update `ConfigFileApplicationListener` so that `spring.profiles.active`
and `spring.profiles.include` can use the square bracket list notation.

Prior to this commit, only comma-separated lists could be used for
those values.

Closes gh-21006

This commit ensures that file permissions are set on entries that the
Gradle plugin adds to an archive. It also reverts the constant date
and time used for added entries to a previous value to ensure a time
zone offset is not applied.

See gh-20927

Closes gh-21004

Closes gh-21003

Refine `DataSourceAutoConfiguration` conditions so that an empty
`spring.datasource.url` property can be used to enable the embedded
source.

Fixed gh-20996

* pr/20923:
  Use RequestDispatcher.ERROR_STATUS_CODE constant

Closes gh-20923

See gh-20923

* pr/20830:
  Add reference to XChange starter

Closes gh-20830

See gh-20830

This commit marks as deprecated an interface method that is no longer
used, and changes all internal implementations to return `null` to
make the fact that the return value is not used more obvious.

Fixes gh-19844

Prior to this commit, the ManagementErrorEndpoint used to handle error
responses for the management servlet excluded stacktrace and exception
message details from the response unconditionally.

With this commit, the endpoint honors the
`server.error.include-stacktrace` and `server.error.include-details`
properties to conditionally include error details for consistency
with non-management error handling.

Fixes gh-20989

Prior to this commit, default error responses included the message
from a handled exception. When the exception was a BindException, the
error responses could also include an errors attribute containing the
details of the binding failure. These details could leak information
about the application.

This commit removes the exception message and binding errors detail
from error responses by default, and introduces a
`server.error.include-details` property that can be used to cause
these details to be included in the response.

Fixes gh-20505

* pr/20928:
  Polish "Optimize AutoConfigurationImportSelector.filter()"
  Optimize AutoConfigurationImportSelector.filter()

Closes gh-20928

See gh-20928

See gh-20928

See gh-20975

* pr/20973:
  Polish

Closes gh-20973

See gh-20973

See gh-20953

Closes gh-20977

Closes gh-20979

Closes gh-20978

Closes gh-20982

Closes gh-20981

Closes gh-20976

* pr/20966:
  Polish "Add reference to gRPC starter"
  Add reference to gRPC starter

Closes gh-20966

See gh-20966

See gh-20966

Closes gh-20969

* pr/20882:
  Polish "Polish JarFile to extra anonymous inner class"
  Polish JarFile to extra anonymous inner class

Closes gh-20882

See gh-20882

See gh-20882

* pr/20967:
  Prevent shaded imports from Datastax

Closes gh-20967

See gh-20967

* pr/20936:
  Upgrade to Testcontainers 1.14.0

Closes gh-20936