Use inet_pton instead of inet_aton

This exists on all platforms, no messy #ifdef needed.

src/config.c

@@ -896,11 +896,7 @@ 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]);