Hardware-specific tweaks and configuration

Systems with No RTC (real-time clock)

Includes the Raspberry Pi family of SBC (single board computers).

Disable hwclock (if enabled; on the Raspberry Pi it has already been disabled).
```
service hwclock stop
rc-update hwclock disable boot
```
Enable swclock (only useful if /sbin/openrc-run is preserved across boots. For a system mode (classic) install this helps. For a diskless, data, or our hybrid install, it isn’t. Also note that for the Raspberry Pi it comes pre-enabled.
```
rc-update swclock enable boot
service swclock start
```

Includes headless Raspberry Pi systems.

Add and enable HAVEGED package

apk add haveged
rc-update add haveged boot default
service haveged start

TBD