@- If header information is sent after output has already been sent, the warning
@ message will now state the filename and line number at which the first output
@ was made (Zeev)
- Got rid of the old flush() implemenetation in favour of the new one
- Added implicit_flush() support to the output buffering layer.
@- Added implicit_flush() to control whether flush() should be called
@ implicitly after any output (Zeev)
moved output-buffering related functions from basic_functions to output.c
Win32 project need to be updated to reflect new position.
# i'm not really happy with this solution, but it seemed the easiest one!
# the whole output code is a bit hard to understand...
@- Output-Buffering system is now Thread-Safe. (Thies)
