* Reverted some changes to d_net that aren't needed for new interpolation system.
* Allow and prefer new "official" alternate Freedoom IWAD names; deprecate but still support older ones for now.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2842 86ba831e-150c-0410-ab35-e06eaae15ed9