only complain if the user sets "interface = foo"

src/lib/bio/fd_open.c

@@ -684,6 +684,8 @@ static int fr_bio_fd_socket_bind_to_device(fr_bio_fd_t *my, UNUSED fr_bio_fd_con
  */
 static int fr_bio_fd_socket_bind_to_device(fr_bio_fd_t *my, fr_bio_fd_config_t const *cfg)
 {
+	if (!my->info.socket.inet.ifindex) return 0;
+
 	fr_strerror_const("Bind to interface is not supported on this platform");
 	return -1;
 }

src/modules/rlm_radius/bio.c

@@ -16,8 +16,8 @@
 
 /**
  * $Id$
- * @file rlm_radius_udp.c
- * @brief RADIUS UDP transport
+ * @file src/modules/rlm_radius/bio.c
+ * @brief RADIUS BIO transport
  *
  * @copyright 2017 Network RADIUS SAS
  * @copyright 2020 Arran Cudbard-Bell ([email protected])
@@ -846,7 +846,7 @@ static void conn_close(UNUSED fr_event_list_t *el, void *handle, UNUSED void *uc
 		fr_assert_fail("%u tracking entries still allocated at conn close", h->tt->num_requests);
 	}
 
-	DEBUG4("Freeing rlm_radius_udp handle %p", handle);
+	DEBUG4("Freeing handle %p", handle);
 
 	talloc_free(h);
 }