Improved server example

lib/sys/net_linux.q

@@ -12,4 +12,8 @@ bind(fd Int, address Pointer, length Int) -> Int {
 
 listen(fd Int, backlog Int) -> Int {
 	return syscall(50, fd, backlog)
+}
+
+setsockopt(fd Int, level Int, optname Int, optval Pointer, optlen Int) -> Int {
+	return syscall(54, fd, level, optname, optval, optlen)
 }