server: Add support for restarting an async I/O when the client side couldn't finish it right away.
diff --git a/server/request.c b/server/request.c
index 20fe435..7dac5d1 100644
--- a/server/request.c
+++ b/server/request.c
@@ -109,6 +109,7 @@
     no_flush,                      /* flush */
     no_get_file_info,              /* get_file_info */
     no_queue_async,                /* queue_async */
+    NULL,                          /* reselect_async */
     no_cancel_async                /* cancel_async */
 };