Literally identical to Encore remapping, but *only applied when Encore mode is OFF*. Long-requested by Oni, and allows you to reuse textures and skies from other stages without having to duplicate them in different colours.
It was changed during v2 indev to operate off textures supplied rather than offsets. Unfortunately, she didn't bank on the 2.2 merge making it so that only linedefs of specific types would generate the necessary `->text` string from their texture fields. This branch corrects that issue, along with a bonus null-avoidance in P_SetupLevelSky just in case someone messes up the source linedef.
Instead of figuring out where it should be every tick while it's visible, store where it'll be at the start of the map.
Also moved finish line beam into a new file, k_race.c/h, for any Race-specific code.
A few unused variables for sprint map support later too
Changes:
- "waypoint ID" is now tag (previously angle)
- "next waypoint ID" is now angle (previously Z height)
- Z height is Z height
- Radius is controlled by args[0]
- "is finish line" is controlled by args[1]
- Waypoint parameters linedef, riser things, and anchor things will not do anything in UDMF mode
- Non-UDMF maps are unaffected
Move P_SpawnMapThings before P_SpawnSpecialsThatRequireObjects.
Do not remove special from lines with ML_NETONLY or ML_NONET until after
slopes are spawned.
* Fix the title card fade's one-frame invalid memory read.
* Disable a redundant gamestate-activated wipe, which A) horribly broke Encore wipes, B) made normal map transitions take longer than they should, and C) held on the one glitchy title card wipe frame to make the game look more broken than it was.
* Fix Encore wipes being broken by the merge.
* Disable (not remove; may want to use later) the :nick: patch draw attempts from the title card drawer.
* Re-add zonettl support to the title card drawer.
* Move the title card drawer in front of the fade (Looks better for if we showcase 2.2 merge footage before creating a better title card).
