Looking at the john's repo.  There are two entries of `unknown-encoding?`.   I think the second one should be something like `unknown-encoding-name`?

On Thu, Aug 27, 2020 at 3:14 PM Arthur A. Gleckler <xxxxxx@speechcode.com> wrote:
On Thu, Aug 27, 2020 at 3:46 PM John Cowan <xxxxxx@ccil.org> wrote:
After consulting with some CL people, I agree that a predicate to capture an unknown-encoding exception makes sense, so I've added it to the SRFI.

Will anyone raise a flag now if they think my section on peeking custom ports is insufficient?  Thanks.

If these two points are out of the way, we can go for finalization now.

Okay, I'll finalize on Monday unless I hear an objection.