Closes gh-27112

* pr/27102:
  Fix typo in section title

Closes gh-27102

See gh-27102

Closes gh-27106

Fixes gh-27104

Closes gh-27097

Closes gh-27096

Closes gh-27095

Fixes gh-27094

See gh-27086

See gh-27086

Closes gh-27088

Closes gh-27086

Closes gh-27083

Closes gh-27082

Closes gh-27081

Closes gh-27080

Closes gh-27076

Previously, SpringApplicationShutdownHook would call close() on any
registered application context even if it wasn't active as it had
already been closed. This could lead to deadlock if the context was
closed and System.exit was called during application context refresh.

This commit updates SpringApplicationShutdownHook so that it only
calls close() on active contexts. This prevents deadlock as it avoids
trying to sychronize on the context's startupShutdownMonitor on
the shutdown hook thread while it's still held on the main thread
which called System.exit and is waiting for all of the shutdown hooks
to complete.

Fixes gh-27049

See gh-27050

See gh-27046

See gh-27047

See gh-27045

See gh-27044

See gh-27073

See gh-27072

See gh-27043

Closes gh-27074

Update calls to `Instantiator` to that they also include
`ResourceLoader.getClassLoader()`.

Closes gh-27071

Closes gh-27073