Big thanks, that did it! I wish Letcencrypt had their update procedure and instructions in better order. Wasted some time here...
The following instructions from Letsencrypt need a rewrite:
- Don't assume that the reader has any clue at all about what "TLS-SNI-01" means.
- Add an explicit instruction at the top on how to check if anything at all needs to be done.
- Reference upgrade instructions that actually work (see above).
- Don't assume that the reader has any clue where to modify the "renewal configuration". The suggested locations elsewhere are all non-existent.
On to the next hurdle - I haven't yet figured out if i need to do anything at all for things to continue working after 13th February or later in March... does anyone have a clue about that?