2020-05-03 UTC
# 
[snarfed] jacky: the common use case for resending a previously sent webmention is for when you've changed your post. i haven't built full fledged comparison into bridgy pubolish to tell if your post changed from last time, and i don't want to incorrectly return success in case it did change and i don't/can't update your silo post, eg a tweet, so i'm conservative and return 400 on subsequent wms for the same post