while (++(our $vn)) {
open NC, "|-", qw(nc -l -p 8080 -q 1);
print NC "HTTP/1.0 200 OK\xd\xa",
"Content-type: text/plain; charset=utf-8\xd\xa\xd\xa",
"Goodbye, World! (hello, visitor No. $vn!)\xd\xa";
}