Correct a small typo in CHANGES

        HMAC_CTX *HMAC_CTX_new(void);

        void HMAC_CTX_free(HMAC_CTX *ctx);

     For EVP_MD and EVP_CIPHR, complete APIs to create, fill and

     For EVP_MD and EVP_CIPHER, complete APIs to create, fill and

     destroy such methods has been added.  See EVP_MD_meth_new(3) and

     EVP_CIPHER_meth_new(3) for documentation.