network-util: csv headers

[jeromekleinen]

Hi guys,

Just noticed a small issue with the network-util. Depending on the 'append' command line parameter a check is performed to see whether or not a header row should be written to the file, by checking the value of args.append against False. However, when the append parameter is not specified it actually defaults to None.

I changed the check to 'if args.append is not True' which covers both the False and the None case. I guess also common.py could be changed to set a default value or type for the append command line parameter.

Jerome