In an effort to reduce the change of version numbers, dependents of
`radicle-node` should not need to know about the modules:
- `control`
- `wire`
- `worker`
These are internal to the `radicle-node` running, and none of its dependents
accessed them.
This resulted in removing two unused type aliases.
With this change, the location of the secret SSH key can be configured
through `${RAD_HOME}/config.json` so that the node key does not have to
be placed under `${RAD_HOME}/keys` anymore.
Further, there is now an option to override `config.json` directly when
executing `radicle-node` via the command line argument
`--secret`.
The primary motivation is more flexible deployments, for example
leveraging external secret management solutions, like
<https://systemd.io/CREDENTIALS/>.
The secret key is fingerprinted by taking the fingerprint of the public
key corresponding to the secret key. This allows to detect when the
secret key changes.
Mostly changes of `use`s and moving components to `radicle-protocol`,
with the goal of just getting `radicle-node` to work on top of the new
`radicle-protocol` crate.