Make local HttpDaemon for testing use a random unused port instead of a fixed
one. Avoids possible issues with the port chosen already being used on the
local machine.
Change-Id: I1ca10b7e5ce198350e14321afc50c36d78b1c0b4
QNetworkAccessManager can handle file:// URLs without additional work. Make
HttpGet aware of that so you can now also use it to retrieve file:// URLs. Add
a unit test for it as well.
Change-Id: If64b57453460b70bca9e5b0c725bb78344617bcd
