dawn: correctly propagate multikeyfile errors
|-
?~ seeds.feed
?~(errs [%no-key ~] errs)
- ?~ (test i.seeds.feed)
+ ?~ err=(test i.seeds.feed)
lyf.i.seeds.feed
+ =. errs (snoc errs u.err)
$(seeds.feed t.seeds.feed)
::
++ test
