If a client connection is yet to be established, then
handle_rsp ()
blocks until a connection
request is made. A valid request is handled by
rsp_server_request ()
, which opens a
connection to the client, saving the file descriptor in
rsp.client_fd
.
This connection is also non-blocking. Nagel's algorithm is also disabled, since all packet bytes should be sent immediately, rather than being queued to build larger blocks.