mxcl/homebrew — pull request #18298 by thefloweringash (2013-03-07 02:19:24+00:00)
Title: engine_pkcs11 and libp11 dependancy

"engine_pkcs11 is an implementation of OpenSSL engine interface. It can be loaded
using code, config file or command line and will pass some OpenSSL functions to a PKCS#11 module."