Code review comment for ~paelzer/ubuntu/+source/qemu:merge-6.0-impish

FYI I've seen that there are a bunch of new "not installed" warnings, but all of those are (qemu-)developer documents not matching the users needs. They are better read online anyway and the bits that are helpful are installed already like the qemu-system docs and such.

Re-pushed the most recent branch for the SDl packaging changes - and those (new bits in general) are also the ones I'd want to have reviewed most before we go e.g. to new queue or Debian with it.