Re: how to increase SBSIZE?

[Sally Floyd <floyd@aciri.org>]

I have committed a change to NS that takes care of the bug that
caused NS to core-dump when SBSIZE (the scoreboard for SACK TCP)
was increased too large.  This problem was waiting for someone to
do a proper bug-fix, but that seems unlikely to happen any time
soon, so I have simply commented-out the offending code, which was
for FACK support for TCP with Fast Start, in tcp-fs.cc.

Details are in the log message below.
- Sally
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http://www.aciri.org/floyd/
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Modified Files:
	tcp-fs.h tcp-fs.cc tcp-fack.h 
Log Message:
Changing FackTcpAgent declaration from "public virtual TcpAgent"
to "public TcpAgent", and commenting out Fack code in
tcp-fs.cc (TCP with Fast Start), to allow the scoreboard size
SBSIZE to be increased in scoreboard.h for Sack TCP.