How to set Qt WebKit max proxy connections?

Hi, I am working on a Qt WebKit based app and need to limit the number of HTTP socket connections to a proxy server. Observation with wireshark shows the number growing quite large, over 30! I can't find the right place to do this, either in QNetworkAccessManager or QWebSettings. I started looking in the Webkit source but quickly got lost. Any ideas?

Thanks!
-Daren