K 10
svn:author
V 5
hiren
K 8
svn:date
V 27
2016-12-05T06:20:27.237035Z
K 7
svn:log
V 442
MFC r308943

For RTT calculations mid-session, we explicitly ignore ACKs with tsecr of 0 as
many borken middle-boxes tend to do that. But during 3whs, in syncache_expand(),
we don't do that which causes us to send a RST to such a client. Relax this
constraint by only using tsecr to compare against timestamp that we sent when it
is not 0. As a result, we'd now accept the final ACK of 3whs with tsecr of 0.

Sponsored by:	Limelight Networks

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