Method set_servername_callback

crates/stdlib/src/openssl.rs:1779–1785

(
            &self,
            callback: Option<PyObjectRef>,
            vm: &VirtualMachine,
        )

        #[pymethod]
        fn set_servername_callback(
            &self,
            callback: Option<PyObjectRef>,
            vm: &VirtualMachine,
        ) -> PyResult<()> {
            self.set_sni_callback(callback, vm)
        }

        #[pygetset(name = "_msg_callback")]
        fn msg_callback(&self) -> Option<PyObjectRef> {