Exit if can't set curve ID

src/conn.c

@@ -139,10 +139,13 @@ conn_init(Conn *conn)
 
 		if (param.ssl_groups) {
 			int ssl_err = SSL_set1_curves_list(conn->ssl, param.ssl_groups);
-
+			if (!ssl_err) {
+				fprintf(stderr, "Requested group unsupported. Exiting...\n");
+				exit(0);
+			}
 			if (DBG > 2)
 				fprintf(stderr,
-					"core_ssl_connect: set_grtou returned %d\n",
+					"core_ssl_connect: set_group returned %d\n",
 					ssl_err);
 		}
 	}