I discovered that the IP logger in Greenmine had gotten broken at some point back in February, which in turn meant I'd been using the wrong IP address for manor.hypertwins.org, which meant that the SSL cert renewal didn't work...
Fixed that, fixed the SSL cert, fixed Prosody's SSL cert access (you have to change ownership *and* permissions), and the rest of the day was frantic dialogue on various fronts.
#woozlog