QSslConfiguration: Distinguish HTTP connections also by things like local certificate

From IRC:
"Do you know if QNetworkAccessManager uses the same ssl local configuration for all requests to the same host/port? Looking at the code, it seems that if I do two requests to the same host, each with different local certs, the second will reuse the cached connection from the first, meaning they'll both use the same local cert?"
"instead of distinguishing a QHttpNetworkConnection by (host,port,ssl) we should do (host,port,ssl,sslconfig)"
"yes, at least when it comes to the user's identification. for proxies, we already distinguish with the username"