io: do not use IO_FORGOTTEN_FUTURES_SKIP_CQE on linux <= 5.17
Apparantly my assumption that io_uring ignores unknown cqe flags is wrong.
And io_uring < Linux 5.17 completes forgotten futures with -EINVAL
.
Fixes: e140759d
Apparantly my assumption that io_uring ignores unknown cqe flags is wrong.
And io_uring < Linux 5.17 completes forgotten futures with -EINVAL
.
Fixes: e140759d