This was by far the messiest game, there's two reasons for this.
First, the portal links do not need to be in an actual portal sector, so they cannot be used to detect portal sectors.
Second, the game moves portals in place, so all offsets are (0,0,0) so that not even these can be used for detection.
The only working method is the super-complicated original way to look up portals at run time, just being done at map start.
Having static portal links should reduce the render glitches quite significantly because the renderer knows now which sectors belong to a portal and can use this information to ensure proper processing.
Unlike the other games these are so poorly defined that the engine has to rely on the original fudging to pick the proper portal to link to. As a result they are just as limited as they always were.
In addition all the portal search code had to be reinstated.
New names are:
REDNECKxx.ogg for Redneck Rampage
REDNECKRIDESxx.ogg for RR Rides Again.
SHADOWxx.ogg for Shadow Warrior.
The motivation here is to allow copying all this music to a single folder or .zip file and reference it from all games.
This reverts commit 4fcec5f6d3.
Functionality wasn't working properly, most players will never use it and care only for 100% originality. Was a nice idea, though.
# Conflicts:
# source/core/gamecvars.cpp
# source/games/sw/src/panel.cpp
