man/io_uring_register.2: add description of restrictions

Starting from Linux 5.10 io_uring supports restrictions.
This patch describes how to register restriction, enable io_uring
ring, and potential errors returned by io_uring_register(2).

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 file changed