- update to version 4:
* Add RDRAND instruction support
* Add -q and -v options for quiet and verbose output
* Add -p option for specifying PID file (text file containing daemon's PID)
* Disable entropy source if facing continued failures, but be
tolerant of the occasional fault.
* Default device is now the preferred /dev/hwrng
* Do not use TPM device for RNG access, if /dev/hwrng is present
(TPM RNG is exported via the kernel, in newer kernels)
- require $remote_fs in init script as binaries are below /usr