Document SSL_OP_NO_RENEGOTIATION as new in 1.1.1

Closes: https://github.com/openssl/openssl/issues/4897


Signed-off-by: Christian Heimes <christian@python.org>

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4898)