Changes between 1.1.0f and 1.1.1 [xx XXX xxxx]
+ *) Add SM4 implemented according to GB/T 32907-2016.
+ [ Jack Lloyd <jack.lloyd@ribose.com>,
+ Ronald Tse <ronald.tse@ribose.com>,
+ Erick Borsboom <erick.borsboom@ribose.com> ]
+
*) Reimplement -newreq-nodes and ERR_error_string_n; the
original author does not agree with the license change.
[Rich Salz]