Hi nusenu,

> Oh, I didn't know about this feature since it is not documented in the man page, but great
> to see that it exists. It fits my use-case very well!

*sigh* this is undocumented indeed. Bug #12698 (https://bugzilla.ipfire.org/show_bug.cgi?id=12698)
has been raised for fixing this.

Thanks, and best regards,
Peter Müller