sslprotocols update (#4410)

Author: tdykstra

samples/snippets/csharp/VS_Snippets_Remoting/NclSslClientAsync/CS/clientasync.cs

@@ -215,7 +215,7 @@ public static int Main(string[] args)
             sslStream.BeginAuthenticateAsClient(
                 serverName,
                 clientCertificates,
-                SslProtocols.Ssl3,
+                SslProtocols.None,
                 true,
                 new AsyncCallback(AuthenticateCallback),
                 sslStream);

samples/snippets/csharp/VS_Snippets_Remoting/NclSslServerAsync/CS/serverasync.cs

@@ -192,7 +192,7 @@ void ProcessClient (ClientState state, X509Certificate serverCertificate)
             try
             {
                 state.stream.BeginAuthenticateAsServer (serverCertificate,
-                    true, SslProtocols.Tls, true,
+                    true, SslProtocols.None, true,
                     new AsyncCallback(AuthenticateCallback),
                     state);
             }

samples/snippets/visualbasic/VS_Snippets_Remoting/NclSslClientAsync/VB/clientasync.vb

@@ -189,7 +189,7 @@ Namespace Examples.Ssl
 			' The server name must match the name on the server certificate.
 			sslStream.BeginAuthenticateAsClient(
 			    serverName, clientCertificates,
-                SslProtocols.Ssl3, True, 
+                SslProtocols.None, True, 
                 New AsyncCallback(AddressOf AuthenticateCallback), sslStream)
 
 			' User can press a key to exit application, or let the 

xml/System.Security.Authentication/SslProtocols.xml

@@ -252,7 +252,7 @@
       </ReturnValue>
       <MemberValue>192</MemberValue>
       <Docs>
-        <summary>Specifies the TLS 1.0 security protocol. The TLS protocol is defined in IETF RFC 2246.</summary>
+        <summary>Specifies the TLS 1.0 security protocol.  TLS 1.0 is provided for backward compatibility only. The TLS protocol is defined in IETF RFC 2246.</summary>
       </Docs>
     </Member>
     <Member MemberName="Tls11">