iOS port of QNetworkRequest is not respect Cookie management of Qt API

Hello.

I was working on a mobile application using Http Request. iOS does the cookie management as default. I partially examine the qtbase/src/network/access/qnetworkreplynsurlconnectionimpl.mm. There should be a line like

nsRequest.HTTPShouldHandleCookies = NO;

According the link below, this property is default YES. Qt API should handle this with QNetworkCookieJar if we want to.

https://developer.apple.com/library/Mac/documentation/Cocoa/Reference/Foundation/Classes/NSURLRequest_Class/index.html#//apple_ref/occ/instp/NSURLRequest/HTTPShouldHandleCookies

The main problem, Cookies managed by iOS is permanently stored in app sandbox. The get rid of that, either you should delete your application, or should delete programmatically. Either way, Qt should have us own classes for this.