Instructions for running the SimpleXMQ servers as system daemons:

The package installs rc.d scripts for both daemons:

- `smp_server`
- `xftp_server`

Each server must be initialized once before its first start so that
configuration, certificates, and state directories are created.

Example:

```sh
doas rcctl enable smp_server xftp_server
doas -u _simplexmq /usr/local/bin/smp-server init
doas -u _simplexmq /usr/local/bin/xftp-server init \
    --sign-algorithm ED25519 --path /var/simplex/xftp-server/files \
    --quota 100gb
doas rcctl start smp_server
doas rcctl start xftp_server
```

The servers store configuration under `/etc/simplex/` and runtime
data under `/var/simplex/`.

The explicit ED25519 option is required because LibreSSL does not
provide the ED448 algorithm selected by the upstream XFTP default.
