Suite B support for DTLS 1.2

Check for Suite B support using method flags instead of version numbers:
anything supporting TLS 1.2 cipher suites will also support Suite B.

Return an error if an attempt to use DTLS 1.0 is made in Suite B mode.

ssl/ssl.h

diff --git a/ssl/ssl.h b/ssl/ssl.h
index cba5f4d..e14a8d4 100644
--- a/ssl/ssl.h
+++ b/ssl/ssl.h
@@ -2724,6 +2724,7 @@
 #define SSL_R_NULL_SSL_METHOD_PASSED			 196
 #define SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED		 197
 #define SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED 344
+#define SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE	 387
 #define SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE	 379
 #define SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE		 297
 #define SSL_R_OPAQUE_PRF_INPUT_TOO_LONG			 327