Apparently Cygwin requires sys/types.h before netinet/tcp.h but doesn't
include it by itself, as shown here:
https://github.com/haproxy/haproxy/actions/runs/
131943890
This patch makes sure it's always present, which is in server.c and
the SPOA example.
#include <stdio.h>
#include <signal.h>
#include <arpa/inet.h>
+#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/socket.h>
*
*/
+#include <sys/types.h>
#include <netinet/tcp.h>
#include <ctype.h>
#include <errno.h>