A few preliminary changes during sweep for code points that need to change during final ev_specials integration.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2380 86ba831e-150c-0410-ab35-e06eaae15ed9
Remove now-useless mapformat parameter of P_SpawnSpecials.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2381 86ba831e-150c-0410-ab35-e06eaae15ed9
ev_specials integration complete:
* Called into everywhere for runtime action specials
* Eliminated all now-unused code
* Knocked off TODO for conversion of global genDoorThing into a member of doordata_t struct

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2382 86ba831e-150c-0410-ab35-e06eaae15ed9
* Fix intermission wipe regression that was earlier repaired in DOOM for Heretic as well.
* Removed "end game" from Heretic main menu, matching changes made to DOOM earlier.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2383 86ba831e-150c-0410-ab35-e06eaae15ed9