stream: Introduce PIPE type

Main reason to have this at all is to make char-by-char reading
feasible.  This occurs at `stream_chunk`, and previously if we passed
in STDIN for `stream_init_file`, STDIN will only terminate once
STREAM_DEFAULT_CHUNK number of characters have been fed into the pipe.

This isn't desirable for STDIN (we really want to read char-by-char
for expressions), nor would it necessarily be desirable in network
applications.  So any stream marked STREAM_TYPE_PIPE will only chunk
character-by-character rather than genuine chunks.

0 files changed, 0 insertions, 0 deletions