Fixes gh-17974

Fixes gh-17550

Reverts commit 2be3027d
on 2.1.x

See gh-17539

* pr/17539:
  Polish "Ensure Flyway/Liquibase runs before Quartz"
  Ensure Flyway/Liquibase runs before Quartz

Closes gh-17539

See gh-17539

Add post processors to ensure that SchedulerFactoryBean and Scheduler
beans depend on the Flyway and Liquibase beans.

See gh-17539

Fixes gh-17579

Fixes gh-17541

Closes gh-17814

Closes gh-17933

Update the reference guide with a note about using environment variables
to configure logging.

Closes gh-17958

This reverts commit f6f99d78 as 9.4.20
includes an incompatible class change where an abstract class in
Jetty's public API was changed to an interface, making it incompatible
with Framework 5.1.9.

See gh-18035

Closes gh-18043

Closes gh-18042

Closes gh-18041

Closes gh-18040

Closes gh-18039

Closes gh-18038

Closes gh-18037

Closes gh-18036

Closes gh-18035

Closes gh-18034

Closes gh-18033

Closes gh-18032

Closes gh-18031

Closes gh-18030

Closes gh-18029

Closes gh-18028

Fixes gh-18018

Closes gh-17975

Closes gh-17988

Update the reference documentation to use versioned links rather then
`/current/` whenever possible.

Closes gh-18000

Update reference documentation source to use consistent attribute names
and fix a few formatting issues.

Fixup ignore logic in `EndpointRequest`.

See gh-18012

Closes gh-18002