Fix MingW version issue
diff --git a/include/polarssl/config.h b/include/polarssl/config.h
index 7bbef55..d98bdb3 100644
--- a/include/polarssl/config.h
+++ b/include/polarssl/config.h
@@ -108,6 +108,8 @@
* System supports the basic socket interface for IPv6 (RFC 3493),
* specifically getaddrinfo(), freeaddrinfo() and struct sockaddr_storage.
*
+ * Note: on Windows/MingW, XP or higher is required.
+ *
* Comment if your system does not support the IPv6 socket interface
*/
#define POLARSSL_HAVE_IPV6