Closes gh-14011

* pr/14046:
  Fix freemarker documentation link

Closes gh-14046

Closes gh-14040

* gh-14019:
  Polish "Fix NPE in FlywayEndpoint when migration.installedOn is null"
  Fix NPE in FlywayEndpoint when migration.installedOn is null

Closes gh-14019

See gh-14019

Closes gh-13947

This commit makes sure to use a configurable timeout to check if the
Couchbase cluster is up, rather than relying on the default that can be
quite long.

Closes gh-13879

* pr/14001:
  Invoke Inflater.end() in ZipInflaterInputStream.close()

Closes gh-14001

Previously, the setter of a property whose second letter is upper-case (
such as `oAuth2Uri`) was not detected properly. The JavaBean spec states
that, in such a case, the first letter should not be capitalized (i.e.
the setter should be `setoAuth2Uri` rather than `setOAuth2Uri`).

This commit makes sure that Jackson uses standard bean names and fixes
the setter detection algorithm to take this case into account.

Closes gh-13878

* pr/14015:
  Polish OnWebApplicationCondition

Closes gh-14015

* pr/14013:
  Fix typo

Closes gh-14013

Those can be re-added at any time there is Spring Boot 2 support

Closes gh-13510

This commit restore the use of the `postProcessRequestHeaders` method
when overridden in a custom HttpExchangeTracer implementation.

Closes gh-13924

See gh-13988

* pr/13991:
  Return null immediately when sla is null in convertSla()

Closes gh-13991

Prior to the changes that fixed #12451,
`FilteredPropertySources` and `CompositePropertySources` were required
by the `PropertySourcesDeducer` to ensure that configuration properties binding
could see changes to the environment even when there was a
PropertySourcesPlaceholderConfigurer in the context. #12451 changed the way
property sources are adapted by `SpringConfigurationPropertySources`, removing the
need for `FilteredPropertySources` and `CompositePropertySources`.

Fixes gh-13738

Fixes gh-13965

* pr/13985:
  Upgrade maven wrapper to Maven 3.5.4

Closes gh-13985

* pr/13982:
  Add dependency management for micrometer-registry-cloudwatch

Closes gh-13982

* pr/13963:
  Polish

See gh-13963

This commit makes sure that ServletEndpointRegistrar does not add a
duplicate `/` if the basePath is suffixed with it already

Close gh-13964

* pr/13961:
  Optimize some StringBuilder.append() calls

Closes gh-13961