Add text pointing to full change list.
OpenSSL CHANGES
_______________
+ This is a high-level summary of the most important changes.
+ For a full list of changes, see the git commit log; for example,
+ https://github.com/openssl/openssl/commits/ and pick the appropriate
+ release branch.
+
Changes between 1.1.0f and 1.1.1 [xx XXX xxxx]
*) In the UI interface, make it possible to duplicate the user data. This
