Changes between 1.1.1 and 3.0.0 [xx XXX xxxx]
+ *) Enforce a minimum DH modulus size of 512 bits.
+ [Bernd Edlinger]
+
*) Changed DH parameters to generate the order q subgroup instead of 2q.
Previously generated DH parameters are still accepted by DH_check
but DH_generate_key works around that by clearing bit 0 of the