Reminder: unstable tarball deadlines are not optional

And thanks to the magic of timezones, when we do notice it may be at at a very inconvenient time for you, like Friday evening, or the middle of the night…

I left a comment in Emmanuele’s topic to explain why we cannot detect these problems in advance: our normal CI can catch all problems except missing releases, but there’s no way to prepare for missing releases until the release deadline has passed, at which point everything is broken until we’ve responded to each missing release one at a time.