Jack Grigg

Pushed 333788029ed6df0b0a052c8471975ff2cd1496ba to show how removing `SpecificMgmKey` from this PR achieves the same goal.

[Rebased on `main`](https://github.com/iqlusioninc/yubikey.rs/compare/333788029ed6df0b0a052c8471975ff2cd1496ba..8a6d6e674580ce9383f072cf814ef07d4834f98c) to fix merge conflicts after #621 was merged.

Moved to https://github.com/zcash/zcash-devtool/pull/80.

Draft for now because #588 needs to be reviewed and merged first.

[Rebased on 588](https://github.com/iqlusioninc/yubikey.rs/compare/1d87b5f78fca9fc9ce55bccebcae6cf1517187b1..ca197e15cc16c9d063bf2b9ad85fb2c148aab317) after it was rebased.

[Rebased](https://github.com/iqlusioninc/yubikey.rs/compare/131f53f77fe25099292c24311223814c4fb05adf..6d4eb5b387906b3f0b536136bb19686427852c8e) on #588 after it was rebased on `main`.

[Force-pushed](https://github.com/iqlusioninc/yubikey.rs/compare/6d4eb5b387906b3f0b536136bb19686427852c8e..cb5d0a5400c51f67fd173ba522650a7d5fb432d9) to fix a dependency conflict.

[Rebased](https://github.com/iqlusioninc/yubikey.rs/compare/cb5d0a5400c51f67fd173ba522650a7d5fb432d9..79d86101a376d89156b73f8ac34eb5fdd925f781) on #588 after it was updated.

@joostd the blocker for this PR was getting #588 finished. That's now been done, so we just need PR review of #588 and this PR.

[Rebased](https://github.com/iqlusioninc/yubikey.rs/compare/87c8544954aa759733c831f03715c8cebc293ccb..2c4590572df385c3d6ef22cf2a7470ddf3f59e2c) on #588 after it was updated and rebased.