Jenkins 2.440.1

What's new in this version:

- Important security fixes
- Fix missing folder icons
- Update the bundled Matrix Project Plugin from 818.v7eb_e657db_924 to 822.824.v14451b_c0fd42
- Find selected radio option when validating instead of the last one used
- Add an Appearance category to the setup wizard
- Add missing *_fr.properties in win32errors and hudson, lib, and Jenkins resources. Translate hudson/Messages.properties, hudson/model/Messages.properties, and jenkins/model/Messages.properties into French
- Update to various UI elements. Style widget panes to match Jenkins. Modernize icons, controls, and fonts
- Add telemetry for basic Java system properties describing the environment
- Turkish localization fixes for build, login, and user management pages
- Fix a minor memory leak in a Remoting log statement. Add forward proxy support for WebSocket. Support custom certificate options for WebSocket
- Remove build timeline widget from the build history pages of views, jobs, and agents
- More consistently report errors launching outbound agents
- Stop recommending JNLP URL in agent launch instructions
- Deprecate all configurable options in Launch agent by connecting it to the controller (inbound in JCasC), as these are only useful in conjunction with the deprecated jnlpUrl mode
- The jnlpUrl ${JENKINS_URL}/computer/${AGENT_NAME}/jenkinsagent.jnlp argument to the agent JAR has been deprecated. Use url ${JENKINS_URL} and name ${AGENT_NAME} instead, potentially also passing in webSocket, tunnel, and/or work directory options as needed
- Removed deprecated and unused class UserProperties
- Deactivate the administrative monitor when all previously offline agents are again online
- Prepare node monitors to work with configuration as code
- Rework node monitor configuration
- Allow configuration of disk thresholds globally and for each agent. Improve the warning when disk space is too low. Ensure agents are taken offline when disk space is low
- Fail fast when attempting to load a broken plugin that contains the Jenkins test harness in production
- Add packaging support for Unix domain sockets
- Accept all 2xx and 3xx status codes to validate proxy in HTTP Proxy Configuration
- Ensure uptime is independent of system clock
- Show monitoring data on agent page
- Use a notification and Jenkins modal for 'Apply' button failures
- BootFailure subclasses can now override the Jenkins startup failure page
- Reduce the window of time during which a crash may lead to an inconsistent state on Linux
- Restore printing output from println and similar methods for the groovy CLI command (regression in 2.427)
- Refer to the correct option in the security configuration help text
- Restore security configuration help text and remove obsolete help text
- Some agent-related objects could be kept in memory after being disconnected and removed from the computer list
- Avoid incorrect styling when deleting the first of two shell steps in a job definition
- Prevent a deadlock that can occur when loading PermalinkProjectAction.Permalink
- Display strings consistently in the requested language when running Jenkins in a JVM with a non-english locale
- Fix nested job link in mobile view
- Do not show option to copy items when there are no items visible
- Display correct time zone in build history
- The tunnel property on an inbound agent was inadvertently broken for JCasC usage in 2.437. It remains deprecated and usages should be deleted (regression in 2.437)
- Fix SimpleScheduledRetentionStrategy on inbound agents. Allow suspended inbound agents to again accept tasks when they are reconnected and the configured scheduling policy is enabled
- Remove code that may have caused an agent-side hang under a rare race condition
- Reduce the likelihood of thread creation errors on agents