Behavior change: QUrl doesn't accept setPath without leading slash anymore

#include <QUrl>
#include <QDebug>

int main(int argc, char *argv[])
{
    QUrl url;
    url.setScheme(QLatin1String("http"));
    url.setAuthority("foo.bar.com");
    url.setPath("bla/blubb");
    qDebug() << url << url.isValid();

    url.setPath("/bla/blubb");
    qDebug() << url << url.isValid();
}

 QUrl( "http://foo.bar.com/bla/blubb" )  true 
 QUrl( "http://foo.bar.com/bla/blubb" )  true 

 QUrl( "" )  false 
 QUrl( "http://foo.bar.com/bla/blubb" )  true