In-game hosted wasteland support / Arma2Net code removed

Hi, here are two other commits.
1. In-game hosted wasteland is now supported. Missions etc. works now for the hosting player.
2. Removed the Arma2Net conditional code.

The commits of the other pull request are also included in my new 404 branch. I rebased the 404 branch to your master, so it's easier to merge.