.nbdkit rebased to version 1.38 The `nbdkit` package has been rebased to upstream version 1.38, which provides various bug fixes and enhancements. The most notable changes are the following: * Block size advertising has been enhanced and a new read-only filter has been added. * The Python and OCaml bindings support more features of the server API. * Internal struct integrity checks have been added to make the server more robust. For a complete list of changes, see the link: https://libguestfs.org/nbdkit-release-notes-1.38.1.html [upstream release notes].