only works with Trio, but oh well

XXX some tests still splat

if non-strings are in a path, at least print them

Example: counter (family code "1d"):
you can now poll "counter/0" and "counter/1"

TEST

so there won't be two identical jobs

Don't restart from the reader task. That isn't stable.
Instead, use a new taskgroup with all non...

too fragile

Must pass cancellation unmolested

Revert "If the server reports busy, re-queue the current request"

This reverts commit 82a55c5a5...

like closed file

required for anyio

several fixes intermixed :-/

also log reconnects

also add a couple of types