* Again, tweak the spawning code to take maximum advantage of these gains.
* Fix potential crashes with MT_NULL mace/chain types supplied.
* #ifdef out the height-clipping code. It needs more TLC than I can give it right now, and the existing behaviour is less obviously broken (sadly enough).
* Fix chainmace points, which were apparently broken without anyone realising.
* Completely rework how mace/chainbars are spawned to reduce the number of matrix multiplications required EVEN FURTHER!
* Reimplement the maceretry solidity stuff (effect 4).
* Flip the mminlength stuff so that existing dev maps don't break badly.
* Fix hacky chainbar grabbing.
* Tweak height of tinychain a smidge.
* Fix ability to turn chains (still disabled by default, just at least want the option...)
* Replace max speed setting with a "minimum chainlink distance" setting - if greater than zero, that many chains will not be spawned from the center outwards. Doesn't affect the head of the chain at all, since otherwise what's the point? :V
* Handle all chain objects as a hnext/hprev chain.
* When removing mobjs with hnext/hprev, "repair the chain" (make the h links meet).
* Fix hidden slings, which I accidentially broke when I revamped maces the first time.
* Kill MF2_MACEROTATE. Not needed for anything anymore.
* P_MaceRotate now available to Lua to make up for it.
* Related: Made modifying hnext/hprev using Lua safer, so it keeps the reference counts in play.
* Prevent ANY input when blindfolded.
* Make CECHOs always perplayer'd. (A little hacky; quads will need work here.)
* Make NiGHTS link timer bounces not a mess, and only when the colour changes.
I don't fully understand this, but it's what software does and it fixes the issue of the lighting in DSZ3. Also don't need the extra call to R_Prep3DFloors.
* cv_powerupdisplay. Never, First-person only (default), Always.
* New monitor stuff.
* Fixed hitmessages.
* Some CTF stuff.
* Aaaaugh it's a lot I hate myself I need to work on my coursework.
* I'll figure out what I did here in the merge request when that's done.
I don't think it does anything for us anymore, and might even break things with slopes.
Someone let me know if I'm wrong and am breaking things horribly here.
Transformation based on screen space would make sense if we didn't want anything in the world to effect the sprites.
This should allow sprite splitting and sorting of sprites with level geometry easier.
stransform is no longer needed.
* Make TIME part of HUD count down in a bunch of circumstances where it was otherwise some other seperate thing.
* Make race countdown happen in a bunch of appropriate circumstances.
* Refactor race countdown.
* Remove a lot of useless stuff from H&S/Tag UI.
* Make co-op/competition/race end-of-act countdown use the race countdown and bigger HUD font.
* Remove useless PLAYING/SPECTATE text from lives element.
* Merge lap counter into lives element.
* Move some other text around.
Solid walls *can* be cut
Fix issues with water and fog FOFs not cutting each other out correctly
Fix Fog colourmap and lighting setting that is done here.
Remove HWR_SplitFog
There is currently a bug with FF_DOUBLESHADOW (that also exists in software) but has a larger impact here. When 2 FF_DOUBLESHADOW lights are directly stacked on each other the bottom one has its height set incorrectly. This causes all the Fog in the timed gravity flipping section of ERZ2 to be drawn and it looks really bad.
This reverts commit 83d4f29367.
The reason I am reverting this is because the last commit actually fixes the *old* screenshot functionality, as the screen is being drawn back onto the buffer after they're swapped in the "real" size. Meaning the old function actually works perfectly fine now.
