Changes between 1.1.1 and 3.0.0 [xx XXX xxxx]
+ *) Introduced new error raising macros, ERR_raise() and ERR_raise_data(),
+ where the former acts as a replacement for ERR_put_error(), and the
+ latter replaces the combination ERR_put_error()+ERR_add_error_data().
+ ERR_raise_data() adds more flexibility by taking a format string and
+ an arbitrary number of arguments following it, to be processed with
+ BIO_snprintf().
+ [Richard Levitte]
+
*) Introduced a new function, OSSL_PROVIDER_available(), which can be used
to check if a named provider is loaded and available. When called, it
will also activate all fallback providers if such are still present.
Major changes between OpenSSL 1.1.1 and OpenSSL 3.0.0 [under development]
+ o Added error raising macros, ERR_raise() and ERR_raise_data().
+ o Deprecated ERR_put_error().
+ o Added OSSL_PROVIDER_available(), to check provider availibility.
o Added 'openssl mac' that uses the EVP_MAC API.
o Added 'openssl kdf' that uses the EVP_KDF API.
o Add OPENSSL_info() and 'openssl info' to get built-in data.