Method set_servername_callback

crates/stdlib/src/ssl.rs:1656–1663

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

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

        #[pygetset]
        fn security_level(&self) -> i32 {