This is correctly taken care of by hwcrhk_init(). While we're at it, give
this engine the official name of the library used (CHIL, for Cryptographic
Hardware Interface Library).
OpenSSL to have to opt out hardware support instead of having to opt
it in. And since the hardware support modules are self-contained and
actually check that the vendor stuff is loadable, it still works as
expected, or at least, so I think...
whatever the underlying API is. It must return (void *) because shared
libraries can expose functions, structures, or whatever. However, some
compilers give loads of warnings about casted function pointers through
this code, so I am explicitly casting them to the right prototypes.
