K 10
svn:author
V 7
rscheff
K 8
svn:date
V 27
2020-05-21T19:46:11.532552Z
K 7
svn:log
V 644
MFC r360477: Correctly set up the initial TCP congestion window in all cases

by not including the SYN bit sequence space in cwnd related calculations.
Snd_und is adjusted explicitly in all cases, outside the cwnd update, instead.

This fixes an off-by-one conformance issue with regular TCP sessions
not  using Appropriate Byte Counting (RFC3465), sending one more
packet during  the initial window than expected.

PR:		235256
Reviewed by:	tuexen (mentor), rgrimes (mentor, blanket)
Approved by:	tuexen (mentor), rgrimes (mentor, blanket)
MFC after:	3 weeks
Sponsored by:	NetApp, Inc.
Differential Revision:	https://reviews.freebsd.org/D19000

END