rust bindings : Support for disabling validation of stapled oscp response

[mathpal]

Problem:

In the rust bindings, s2n_config_set_check_stapled_ocsp_response is not available, and as a result if server returns ocsp response, then the client would end up validating it, even if it wasn't requested.

Solution:

in impl Config

    pub fn check_stapled_ocsp_response(&mut self, enabled : bool) -> Result<&mut Self, Error> {
        unsafe {
            s2n_config_set_check_stapled_ocsp_response(self.as_mut_ptr(), enabled as u8).into_result()
        }?;
        Ok(self)
    }

• Does this change what S2N sends over the wire? No
• Does this change any public APIs? Exposes a new api to Config rust binding.
• Which versions of TLS will this impact? all

Requirements / Acceptance Criteria:

Checking for ocsp response can be completely turned off at config level.