Changes between 1.1.1 and 3.0.0 [xx XXX xxxx]
+ *) RC5_32_set_key has been changed to return an int type, with 0 indicating
+ an error and 1 indicating success. In previous versions of OpenSSL this
+ was a void type. If a key was set longer than the maximum possible this
+ would crash.
+ [Matt Caswell]
+
*) Support SM2 signing and verification schemes with X509 certificate.
[Paul Yang]