Bugfixes:

* Use CV_NOSHOWHELP as an obstacle for CV_CompleteVar (so the hidden variables don't show up and ruin our party or anything).
* Hack around the karteliminatelast thing so we don't have to hex-edit the netids, and can release with current assets (but a different executable, of course, to get the credits).
* Fix M_HandleConnectIP not saving your current position on the menu if you use it while it's empty.