Support payload and recurrence flags in CLI/REPL

[Marenz]

• Remove commented dead code
• Add short-notation for some options
• Actually implement the CLI "payload" option
• Implement recurrence in the CLI/REPL

[Marenz]

no release notes as there is no release with the CLI client yet and we're just adding features noone knew are missing

[Marenz]

@llucax merge queue tests failed, I pushed some fixes to make them more reliable