Autoscreenshot in demos

[:)]

When watching a demo which was recorded on a server with sv_autoscreenshot enabled, the demo-watcher is forced to take a screenshot.

[KadaverJack]

There's no way to change that since demos basically cump all received network packets, including console commands send by the server. There might be a way to prevent that once csqc is ready to use, but until then we'll just have to live with that issue