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Calculate prr_out correctly everywhere
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Authored by rscheff on Mar 1 2021, 2:55 PM.
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Details

Summary

missed the update to calculate prr_out properly
in the case when pipe < ssthresh.

prr_out should account for all packets sent during the
recovery episode. As an approximation (valid under
heavy loss), the original patch only uses
sackhint.sack_bytes_rexmit. This misses all packets
sent beyond recovery Point (snd_recover).

For the pipe > ssthresh case, this was fixed in D28941

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