request: Prepare support for plain python list options.
Make all erp5_promise recipe options optional.

Also, reduce code duplication.
Make tidstorage-repozo arguments more readable.

Split line more naturally (don't separate switch from related argument).
Use long options instead of abbreviations.
Accelerate repozo by loosening checks.

Loosened checks are considered safe enough, and the speedup on many-GB
FileStorage files is significant.