Am Fr., 11. Sept. 2020 um 22:47 Uhr schrieb John Cowan <xxxxxx@ccil.org>:

> I agree that a fdo-internal-fd is a Good Thing, with the same warnings as port-internal-fdo, and I have added it for the benefit of other SRFIs.

What do you mean by "for the benefit of other SRFIs" exactly? If just
for the benefit of implementing them, exposing them to the
user-visible API doesn't look right. Or is a consumer of the final set
of SRFIs expected to call these procedures?