Closes gh-16619

* pr/16613:
  Polish "Fix UndertowWebServer's logger name"
  Fix UndertowWebServer's logger name

Closes gh-16613

See gh-16613

* pr/16507:
  Polish "Cache MimeTypes to improve performance"
  Cache MimeTypes to improve performance

Closes gh-16507

See gh-16507

* pr/16513:
  Polish "Improve DefaultCookieSerializer auto-configuration"
  Improve DefaultCookieSerializer auto-configuration

Closes gh-16513

Spring Session's own configuration support (i.e.
SpringHttpSessionConfiguration) will configure the default
DefaultCookieSerializer with rememberMeRequestAttribute if
SpringSessionRememberMeServices bean has been detected in the
application context.

In contrast, Spring Boot's auto-configured DefaultCookieSerializer does
not do this which results in a different out-of-the-box experience for
users that rely on Spring Session's remember-me integration.

This commit improves Spring Session DefaultCookieSerializer
auto-configuration to match Spring Session's behavior and make the
auto-configured DefaultCookieSerializer aware of
SpringSessionRememberMeServices bean.

See gh-16513

Closes gh-16596

Closes gh-16591

* pr/16575:
  Polish

See gh-16575

Closes gh-16576

Closes gh-16579

Closes gh-16548

Closes gh-16466

See gh-16178

Closes gh-16490

* pr/16515:
  Add tests for CompressionConnectorCustomizer

Closes gh-16515

Closes gh-16566

This commit improves the detection of a property source when more than
one group with the same type exist.

Closes gh-16549

The move to an HTTPS URL for the xmlns:xslt identifier has the unwanted
side-effect of disabling indentation.

This commit moves back to an HTTPS URL. It also changes the indent size
to 2, aligning with the size used by all the other poms that are written
by the flatten plugin.

Closes gh-16466

* pr/16527:
  Fix package of java.time.Duration in documentation

Closes gh-16527

Closes gh-15378

See gh-16458

This commit improves type resolution for a unresolved generic type that
uses itself in its upper bound declaration.

Closes gh-16451

Closes gh-16442

Closes gh-16458