Also removed comment that seemed then pointless, and added include
when not already there. Compile tested.

Signed-off-by: Ilpo J
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tcp_sack_swap seems unnecessary so I pushed swap to the caller.
Also removed comment that seemed then pointless, and added include
when not already there. Compile tested.

Signed-off-by: Ilpo J
[ message continues ]

From: "Ilpo Järvinen" <ilpo.jarvinen@helsinki.fi>

Applied, thanks.
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