 closes its
transport connection while the FastCGI request is running on behalf of
that client.  The situation may seem unlikely; most FastCGI
requests will have short response times, with the Web server providing
output buffering if the client is slow.  But the FastCGI application
may be delayed communicating with another system, or performing a
server push.<p>

When a Web server is not multiplexing requests over a transport
connection, the Web server can abort a request by closing the request's
transport 