qemu-nbd: add --discard option
Similar to --cache and --aio, this option mimics the discard suboption of "-drive". Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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Similar to --cache and --aio, this option mimics the discard suboption of "-drive". Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>