Try to fix the build on Windows.

Still untested on the OS, but Grok pointed me to the alternative
function to use.  Hope it works.

src/config.c

@@ -28,7 +28,7 @@
  */
 
 #ifdef _WIN32
-#    include <winsock.h>
+#    include <ws2tcpip.h>
 #else
 #    include <arpa/inet.h>
 #endif
@@ -896,7 +896,11 @@ load_network(void)
             p = ini_section_get_string(cat, temp, "");
             if (p && *p) {
                 struct in_addr addr;
+#ifdef _WIN32
                 if (inet_aton(p, &addr)) {
+#else
+                if (inet_pton(AF_INET, p, &addr)) {
+#endif
                     uint8_t *bytes = (uint8_t *)&addr.s_addr;
                     bytes[3] = 0;
                     sprintf(nc->slirp_net, "%d.%d.%d.0", bytes[0], bytes[1], bytes[2]);

src/network/net_slirp.c

@@ -43,6 +43,7 @@
 #ifdef _WIN32
 #    define WIN32_LEAN_AND_MEAN
 #    include <windows.h>
+#    include <ws2tcpip.h>
 #else
 #    include <poll.h>
 #endif
@@ -503,7 +504,11 @@ net_slirp_init(const netcard_t *card, const uint8_t *mac_addr, UNUSED(void *priv
     const char *slirp_net = net_cards_conf[card->card_num].slirp_net;
     if (slirp_net[0] != '\0') {
         struct in_addr addr;
+#ifdef _WIN32
+        inet_pton(AF_INET, slirp_net, &addr);
+#else
         inet_aton(slirp_net, &addr);
+#endif
         net.s_addr = htonl(ntohl(addr.s_addr) & 0xffffff00);
         host.s_addr = htonl(ntohl(addr.s_addr) + 2);
         dhcp.s_addr = htonl(ntohl(addr.s_addr) + 15);