SECURITY: Seed the OpenSSL PRNG properly.
SECURITY: Seed the OpenSSL PRNG properly.

This commit makes sure that the OpenSSL PRNG is properly seeded by calling
RAND_seed of OpenSSL with 32 bytes generated by the Python os.urandom(32)
function, which should generate secure random bytes.

eriktews/gensafeprime,eriktews/gensafeprime