Add support for PUT & POST to qget test

Add support for PUT & POST to qget test

Due to some bugs that are not reproducable with a normal HTTP GET
This patch also adds the option to process multiple URLs
serially (using application level queuing) rather than the default
parallel (using QNetworkAccessManager queuing on 6 TCP connections)
& renames the authentication command line options to match wget.

Change-Id: I10915feb3bba23abbd7a72f9844c03f347f9bff5
Reviewed-by: Richard J. Moore <rich@kde.org>
Reviewed-by: Martin Petersson <Martin.Petersson@nokia.com>