security: comply with Microsoft's compiler standards

Syntax patching in an effort to comply with
Microsoft's compiler standards.
This patch applies to source files in the security path.

Change-Id: Ifd52c510896837a21006cba89ed4a8683eaa43dd
Tuleap: #902

src/security/tls_session.h

@@ -46,8 +46,8 @@ class IceSocket;
 } // namespace ring
 
 namespace dht { namespace crypto {
-class Certificate;
-class PrivateKey;
+struct Certificate;
+struct PrivateKey;
 }} // namespace dht::crypto
 
 namespace ring { namespace tls {
@@ -65,6 +65,10 @@ public:
     DhParams() = default;
     DhParams(DhParams&&) = default;
 
+    DhParams& operator =(const DhParams&){
+        return *this;
+    }
+
     /** Take ownership of gnutls_dh_params */
     explicit DhParams(gnutls_dh_params_t p) : params_(p, gnutls_dh_params_deinit) {};
 

src/security/tlsvalidator.cpp

@@ -60,6 +60,10 @@
 #include <unistd.h>
 #include <fcntl.h>
 
+#ifdef WIN32_NATIVE
+#include "windirent.h"
+#endif
+
 namespace ring { namespace tls {
 
 //Map the internal ring Enum class of the exported names