3.18: zfs using an old 0.8.3 pool created in ubuntu 20.04 fails with a basic rename of pool
this will most likely be fixed by a upstream issue that I've created, but I'm going to flag it here to, since when its solved it should likely at least be known here that there seem to be issues with using 0.8.3 pools with zfs-2.1.11.
it will make it easier for others that might hit the same problem now that ubuntu 20.04-lts is getting closer to its 5yr standard-EOL.
I'll be working on this on free time on weekends so it will take some time to complete, but it will be completed since my home server is effectively out of commission now until this is fixed.