The Windows httpd (v1.2b8 and later) reports when it is too busy to accept
another request by returning a "503 Too Busy", followed by a short HTML
message. What it means is that there are already 8 active transactions, the
server's limit. The error is returned in the server dispatcher thread without
starting any new transaction threads.
If nobody argues, I'll leave it that way. It ought to get added to the spec.
-- Bob