openssl: Fix compilation on Windows when ngtcp2 is enabled

- Include wincrypt before OpenSSL includes so that the latter can
  properly handle any conflicts between the two.

Closes https://github.com/curl/curl/pull/5606

lib/vtls/openssl.c

@@ -31,6 +31,11 @@
 
 #include <limits.h>
 
+/* Wincrypt must be included before anything that could include OpenSSL. */
+#if defined(USE_WIN32_CRYPTO)
+#include <wincrypt.h>
+#endif
+
 #include "urldata.h"
 #include "sendf.h"
 #include "formdata.h" /* for the boundary function */
@@ -48,10 +53,6 @@
 #include "strerror.h"
 #include "curl_printf.h"
 
-#if defined(USE_WIN32_CRYPTO)
-#include <wincrypt.h>
-#endif
-
 #include <openssl/ssl.h>
 #include <openssl/rand.h>
 #include <openssl/x509v3.h>