wishlist: mark "Require a user namespace to have an idmapping when attached" as done

Signed-off-by: Christian Brauner <[email protected]>

Author: brauner

README.md

@@ -411,9 +411,13 @@ mount.
 
 ### Require a user namespace to have an idmapping when attached
 
+[x] Require a user namespace to have an idmapping when attached
+
 Enforce that the user namespace about to be attached to a mount must
 have an idmapping written.
 
+**🙇 `dacfd001eaf2 ("fs/mnt_idmapping.c: Return -EINVAL when no map is written")` 🙇**
+
 **Use-Case:** Tighten the semantics.
 
 ### Extend `setns()` to allow attaching to all new namespaces of a process