Increase exploit reliability

From some limited testing, it appears that this exploit is
missing \x0d\x0a in the bad chars. If the generated payload / hunter
or egg contain that combination, it seems to cause reliability issues
and exploitation fails.

The home page for this software can be found at
http://www.leighb.com/intrasrv.htm
Use a new Ranking
Land #2275, @Ruslaideemin's badchars improve for intrasrv_bof