This is derived from bcrypt interface from the Python 'cryptacular' library by Daniel Holth, available here: https://bitbucket.org/dholth/cryptacular/
Includes the C sources for a version of bcrypt, which are compiled
as part of raco setup bcrypt. The version of bcrypt is by Solar Designer,
and is available here: http://www.openwall.com/crypt/
Available under the MIT license.