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+ o Major bugfixes (congestion control):
+ - Avoid incrementing the congestion window when the window is not
+ fully in use. Thia prevents overshoot in cases where long periods
+ of low activity would allow our congestion window to grow, and
+ then get followed by a burst, which would cause queue overload.
+ Also improve the increment checks for RFC3742. Fixes bug 40732;
+ bugfix on 0.4.7.5-alpha.