* Adds a compile flag for AuthenticatorConfig
The command can be disabled for authenticators that don't want users to
change their configuration.
* adds tool for calling Config
* std now implies config_command
* removes obsolete comment
* Replaces the Rng256 with RngCore from rand_core
The old trait was designed with our software crypto in mind. We should
use a more standard API going forward.
- Removes libraries/rng256/
- Ports libraries/crypto/ to rand_core
- Moves the used RNG trait to api/
* Use StdRng directy in TestEnv
