XboxDoom 1+ 2: re-added addon

Simple little map wad that adds and replaces the xbox doom 3 limited edition classic doom map E1M10 "sewers" and "hanger" with its secret exit to E1M10 and classic doom 2 map33 "betray" and map02 "Underhalls "with its secret exit to map33 back into classic PC Doom to be used in doom source ports.

For legal reasons this mod only has the map data (no sprites, textures, or flats) so we'll need a legal copy of doom and doom 2 to use these map mods