Function libtls_sys::tls_connect_cbs

pub unsafe extern "C" fn tls_connect_cbs(
    _ctx: *mut tls, 
    _read_cb: tls_read_cb, 
    _write_cb: tls_write_cb, 
    _cb_arg: *mut c_void, 
    _servername: *const c_char
) -> c_int