custom server backup_dir

Change-Id: I1264b6a3c15b7053e54afe0e2fda4132ecef90fa
diff --git a/README.rst b/README.rst
index 8450bf9..e782434 100644
--- a/README.rst
+++ b/README.rst
@@ -693,7 +693,7 @@
           hours_before_full: 24
           target:
             host: cfg01
-
+            backup_dir: server-backup-dir
 
 Backup client with local backup only