Here's a tentative patch which provides a very basic method for
STREAM-WRITE-SEQUENCE for FUNDAMENTAL-BINARY-OUTPUT-STREAMS.
("Tentative" because I've never subclassed streams before). I dare
say we could do better depending on the sequence and target stream
type, but this patch at least defines the function, leaving the door
open to more specialized implementations.
Any comments appreciated and apologies if the patch shocks anyone's