Mention two more block cipher modes that actually exist in our tree;

Mention two more block cipher modes that actually exist in our tree;
from Patrick dot Steuer at de dot ibm dot com
via OpenSSL commit 338ead0f Oct 9 12:16:34 2017 +0200.

Correct the EVP_EncryptUpdate(3) and EVP_DecryptUpdate(3) prototypes;
from FdaSilvaYY at gmail dot com
via OpenSSL commit 7bbb0050 Nov 22 22:00:29 2017 +0100.

Document the additional public function EVP_CIPHER_CTX_rand_key(3);
from Patrick dot Steuer at de dot ibm dot com
via OpenSSL commit 5c5eb286 Dec 5 00:36:43 2017 +0100.