Userland daemon like rng-tools rngd, to feed additional entropy via randomdev_accumulate. Tested on FreeBSD 11.1 with a Ubld.it TrueRNGPro device.
TODO:
- Use Capsicum
- Split up writes of 16 bytes or greater into multiple 8 byte chunks to optimize amount of entropy written ino random pools
- Health tests for input from trng source