Infinity Noise Driver for FreeBSD

See https://github.com/13-37-org/infnoise for the original contents.

Changes from the original repository

• Remove unnecessary files for FreeBSD
• Reconfigured for FreeBSD Make
• Use /dev/trng instead of /dev/random for the entropy feeding (see https://github.com/jj1bdx/freebsd-dev-trng/ for the device installation)
• Use getopt(3) or getopt_long(3)
• Add -w or --wait-time option
• Tested on FreeBSD amd64 12.0-PRERELEASE r340660
• (Previously tested on FreeBSD amd64 11.2-STABLE r335572)
• Adding a wait time up to 5ms per USB polling of 512 bytes: ~98kbytes/sec (still sufficiently fast for providing OS entropy)
• Lowering the FTDI FT240X baud rate only resulted in consuming more CPU time, ineffective

LICENSE

Unlicense, equivalent to the public domain