Buffering problems in pipes

[VLD/VMB]

I think it would be a nice idea if the STDIO package
would treat pipes much like terminals by default; i.e.,
not try to fill the whole BUFSIZ buffer but just use
whatever data the read() returns.  (I don't think
anything useful can be done about output to a pipe,
since allowing single-character write() would be too
inefficient for general use.)

Would this cause problems for anyone?  If not, let's
do it..