* Delete ConfidentialStoreRule

* Also delete MockSecretRule so Secret.fromString works

* Secret.SECRET still referenced by SecretHelper in jenkins-test-harness, used by RekeySecretAdminMonitorTest, also copied in publish-over-*-plugin

* RSAConfidentialKey ought to use the same SecureRandom as the ConfidentialStore; this also lets the mock use a fixed seed

* For now ConfidentialStore.secureRandom can be abstract

* Some core unit tests can be rather verbose; set maven.test.redirectTestOutputToFile

* Looks like we need a ConfidentialStoreRule after all

* Restored another couple of usages

IntelliJ/Java: Duplicate code -- Refactored as AntClassLoader.storeAndConvert(...Convert<T>)

[JENKINS-56643] Util.createSymlink: prefer Files.move(..., ATOMIC_MOVE)

[JENKINS-61692] Fix proxy form validation

Static nested classes

Update .NET version checks to be more correct when Windows services when installing master and agent on platforms with modern .NET versions

[JENKINS-61688] Load build discarder configuration after restart

Do not print random binary data during WebSocketAgentsTest

Remove unused CSS file

Upgrade to 4.3 version of Remoting.

* [JENKINS-61409] Websockets: Use AbstractByteBufferCommandTransport to transport messages

* Depend on timestamped snapshot since incrementals is broken

* Fix reviews

* Update snapshot dep

* Print directly

* [JENKINS-61455] _About Jenkins_ accesible with Jenkins.MANAGE

_About Jenkins_ management link is now accessible to users with
Jenkins.MANAGE or Jenkins.SYSTEM_READ (as well as the usual
Jenkins.ADMINISTRATOR)

* [JENKINS-61455] Test updated to cover this use case

* [JENKINS-61455] Fix test

* [JENKINS-61455] Fix permissions on linked pages
Co-authored-by: NTim Jacomb <timjacomb1+github@gmail.com>

[JENKINS-61521] Ignore RemoteClassLoader$ClassLoaderProxy#fetch3 on telemetry

[JENKINS-61456] "System Information" is accessible with Jenkins.MANAGE

Limit max width of Manage Jenkins items on very large screens

[JENKINS-61457] Allow Jenkins.MANAGE to configure UsageStatistics

[JENKINS-61308] Recommend more API like verb/URL to delete items

Increase context menu scroll speed

[JENKINS-61105] Add support for cross-compilation

Add Javadoc for the categories