man/io_uring_enter.2: document IOSQE_CQE_SKIP_SUCCESS

Add a section about IOSQE_CQE_SKIP_SUCCESS describing the behaviour and
use cases.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/381237725f0f09a2668ea7f38b804d5733595b1f.1637977800.git.asml.silence@gmail.com
[axboe: some rewording]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 file changed