... include simple-streams and peek-char, thanks to my inability to run
the tests on the newly-compiled sbcl.
peek-char can be restored by removing the eval-when around
generalized-peeking-mechanism in target-stream.lisp; simple-streams
uses an unknown type in file-position.
If no one else checks in before me, I'll get around to it today evening
or tomorrow (we have a delivery at work tomorrow or Friday, so I'm a
bit distracted ...).