Subgoal 2 latest sub2goals:
   - backup my filecoin key
   - make a system for backing up deal ids and hashes (data can be
   recovered from numeric deal id)
   - begin uploading things that aren't backed up
   - verify a valued thing can be redownloaded from fresh install, on a
   different system, over tor

   - see if it is possible to renegotiate a deal to extend its duration.
   Try to extend 2210176 to 539 days from present.