This series of commit will be adding an embedded DERP server (and STUN) to Headscale,
thus making it completely self-contained and not dependant in other infrastructure.
logs looks like the following
```
2022-03-02T20:43:08Z DBG Expanding alias=app-test
2022-03-02T20:43:08Z DBG Expanding alias=kube-test
2022-03-02T20:43:08Z DBG Expanding alias=test
2022-03-02T20:43:08Z WRN No IPs found with the alias test
2022-03-02T20:43:08Z DBG Expanding alias=prod
2022-03-02T20:43:08Z WRN No IPs found with the alias prod
2022-03-02T20:43:08Z DBG Expanding alias=prod
2022-03-02T20:43:08Z WRN No IPs found with the alias prod
```
- `preauthkey`, `authkey`, `pre` are aliases for `preauthkey` command
- `ls`, `show` are aliases for `list` subcommand
- `c`, `new` are aliases for `create` subcommand
- `revoke`, `exp`, `e` are aliases for `expire` subcommand
- `apikey`, `api` are aliases for `apikeys` command
- `ls`, `show` are aliases for `list` subcommand
- `c`, `new` are aliases for `create` subcommand
- `revoke`, `exp`, `e` are aliases for the `expire` subcommand
- `namespace`, `ns`, `user`, `users` are aliases for `namespaces`
command
- `c`, `new` are aliases for the `create` subcommand
- `delete` is an alias for the `destroy` subcommand
- `mv` is an alias for the `rename` subcommand
- `ls`, `show` are aliases for the `list` subcommand
- `node`, `machine`, `machines` are aliases for `nodes` command
- `ls`, `show` aliases for `list` subcommand
- `logout`, `exp`, `e` are aliases for `expire` subcommand
- `del` is an alias for `delete` subcommand
This commit removes the need for datatypes.JSON and makes the code a bit
cleaner by allowing us to use proper types throughout the code when it
comes to hostinfo and other datatypes on the machine object.
This allows us to remove alot of unmarshal/marshal operations and remove
a lot of obsolete error checks.
This following commits will clean away a lot of untyped data and
uneccessary error checks.
