Function mbedtls_sys::mbedtls_ssl_conf_rng

pub unsafe extern "C" fn mbedtls_ssl_conf_rng(
    conf: *mut mbedtls_ssl_config, 
    f_rng: Option<unsafe extern "C" fn(_: *mut c_void, _: *mut c_uchar, _: size_t) -> c_int>, 
    p_rng: *mut c_void
)