Ctrl to retrieve extms support.

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

ssl/ssl_lib.c

@@ -1134,6 +1134,11 @@ long SSL_ctrl(SSL *s, int cmd, long larg, void *parg)
             return (int)s->cert->ciphers_rawlen;
         } else
             return ssl_put_cipher_by_char(s, NULL, NULL);
+    case SSL_CTRL_GET_EXTMS_SUPPORT:
+        if (s->session && s->session->flags & SSL_SESS_FLAG_EXTMS)
+            return 1;
+        else
+            return 0;
     default:
         return (s->method->ssl_ctrl(s, cmd, larg, parg));
     }