Allow applying Acked-by/Reviewed-by to whole series from one patch
It's pretty common to reply to the cover letter or the last patch of the series with a Reviewed-by or Acked-by tag that applies to the whole series.
Would it make sense to formalize the syntax for Patchwork to understand it. Something along the lines of:
(For-Series)Reviewed-by: Foo Bar <firstname.lastname@example.org>