Previously the following options were available via the CLI jar:

java -jar jenkins-cli.jar -s http://localhost:8080 safe-restart
java -jar jenkins-cli.jar -s http://localhost:8080 reload-configuration

These calls are no longer listed in:
java -jar jenkins-cli.jar -s http://localhost:8080 help

Both result in the "No such command: [name]" error message. I couldn't see anything related to their removal in the changelog, so I'm assuming this is a mistake rather than intentional.