partial file CRC.  Prevents waiting for both ends to do so sequentially.

Updated code style.
Using new uifcYesNoOpts.
Resoled valid bcc32 warnings (in scfgnet.c).

EX_STDOUT, defining EX_STDIO (to be both STDIN and STDOUT), adding XTRN_CONIO
and EX_CONIO (for future cioxtrn/doorway mode on Windows), change IO_INTS to
XTRN_STDIO

script:
for(s in msg_area.sub) {
	base = new MsgBase(s);
	if(!base.open()) {
		print(base.error);
		continue;
	}
	for(n=0;;n++) {
		print(s + ': ' + n);
		body=base.get_msg_body(true, n);
		if(body==null)
			break;
		quote_msg(body);
	}
}

Added uifcYesNoOpts definition for use with uifc_api.list() and simply Yes/No
options.

Also, prevent a write of zero bytes from clearing the empty event.

compatible) - but why are these absolute rather than relative
(e.g. ../xtrn/...) paths?

32-bit file size limitation.

We really need a way to construct a Socket object passing a descriptor.

outbuf_empty event in sexyz is still having problems with multi-CPU fast
transfers.