REGTEST: make the IP+port logging test more reliable

REGTEST: make the IP+port logging test more reliable

On my machine, test log/b00000.vtc fails ~9/10 times. Apparently, the
connection is often marked as reset before the timeout strikes, so the
log shows "CD" flags instead of "cD". This fix does two things :
  1) shorten the client timeout to 1 millisecond instead of 5
  2) accept both "cD" and "CD" as valid termination states since the
     purpose is to validate the source address and port, and not the
     status itself.