[Libguestfs] nbdkit rust plugin: copyright notices, Cargo workspace, and macro hygiene

Attachments:

• attachment.html (text/html — 26 bytes)
• 0001-Add-a-Cargo.toml-file-to-the-top-level-directory.patch (text/x-patch — 584 bytes)
• 0002-plugins-rust-symbols-used-by-macros-must-be-referenc.patch (text/x-patch — 944 bytes)
• 0003-plugins-rust-add-copyright-notice-to-every-.rs-file.patch (text/x-patch — 7.2 KB)