Nixpkgs organization modules.
- http://www.scala-sbt.org/0.13.5/docs/Launcher/Configuration.html
- https://github.com/cessationoftime/Sbtix
- https://github.com/scopt/scopt
- http://www.herongyang.com/crypto/openssl_verify.html
- http://www.freebsdmadeeasy.com/tutorials/freebsd/create-a-ca-with-openssl.php
- https://en.wikipedia.org/wiki/X.509#Certificate_chains_and_cross-certification