Provisional DTLS 1.2 support.

Add correct flags for DTLS 1.2, update s_server and s_client to handle
DTLS 1.2 methods.

Currently no support for version negotiation: i.e. if client/server selects
DTLS 1.2 it is that or nothing.
diff --git a/ssl/d1_clnt.c b/ssl/d1_clnt.c
index b1f8c5e..ec7ef0d 100644
--- a/ssl/d1_clnt.c
+++ b/ssl/d1_clnt.c
@@ -135,6 +135,8 @@
 	{
 	if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER)
 		return(DTLSv1_client_method());
+	else if (ver == DTLS1_2_VERSION)
+		return(DTLSv1_2_client_method());
 	else
 		return(NULL);
 	}
@@ -146,6 +148,13 @@
 			dtls1_get_client_method,
 			DTLSv1_enc_data)
 
+IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION,
+			DTLSv1_2_client_method,
+			ssl_undefined_function,
+			dtls1_connect,
+			dtls1_get_client_method,
+			DTLSv1_2_enc_data)
+
 int dtls1_connect(SSL *s)
 	{
 	BUF_MEM *buf=NULL;