Pass flags to X509Certificate2 ctor.

Author: Cesar Blum Silveira

src/Microsoft.AspNetCore/CertificateLoader.cs

@@ -95,7 +95,7 @@ private X509Certificate2 TryLoad(X509KeyStorageFlags flags, out Exception except
             {
                 try
                 {
-                    var loadedCertificate = new X509Certificate2(Path, _password);
+                    var loadedCertificate = new X509Certificate2(Path, _password, flags);
                     exception = null;
                     return loadedCertificate;
                 }