Point 2, the words "pipe" vs "fifo".

POSIX (and Unix) use the simple everyday word "pipe" for anonymous
pipes. But they use the acronym "FIFO" for named pipes instead. Both
named and anonymous pipes operate on a first-in/first-out principle and
both are accessed via file descriptors, so there is no particular reason
for the confusing difference in naming.

Since we are taking some liberties with naming in this SRFI, could we
spell it `named-pipe` instead of `fifo` for consistency with anonymous
pipes, and for consistency with named pipes on Windows?