K 10
svn:author
V 5
peter
K 8
svn:date
V 27
2014-01-28T21:13:15.343775Z
K 7
svn:log
V 265
Adjust r239672 from rrs and r258821 from eadler.

By definition, the very first FIN is not a duplicate. Process it normally
and don't feed it to congestion control as though it were a dupe.  Don't
prevent CC from seeing later dupe acks while in a half close state.

END