Michael Tuexen aa36fbd6fa Ensure that when using the TCP CDG congestion control and setting the
sysctl variable net.inet.tcp.cc.cdg.smoothing_factor to 0, the smoothing
is disabled. Without this patch, a division by zero orrurs.

PR:			193762
Reviewed by:		lstewart@, rrs@
MFC after:		3 days
Sponsored by:		Netflix, Inc.
Differential Revision:	https://reviews.freebsd.org/D19071
2019-02-08 20:42:49 +00:00
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