They still aren't perfect, but now they are at least not quite so obviously just translucent polygons over the level. A mixture between partially modulating the background colours and adding the fog colour. Notably white fog blocks look like they're brightening what's behind them.
Additive was also setting noalphatest before, can probably decide that depending on what it needs anyway. I don't think it's currently used anyway.

Sorts all translucent sprites and MD2s so they're drawn after all the opaque ones. Fixes most of the observable issues between translucent MD2s and opaque sprites/MD2s.

Only use glCopyTexImage2D when first creating the screen texture, use glCopyTexSubImage2D anytime after that as it does not define a new texture each time.
Flushing of the screen textures has been implemented for when the screen size changes (so that the screen textures don't stay at a wrong size) and the game is closed, I believe they would leave a memory leak before.

The Far clipping plane did not need to be nearly as high as it was, the new value is 32768, which I suspect is about how far software can render before it completely falls apart.
It is desirable to increase the near clipping plane to between 6-10, but it can introduce more issues with close geometry not being drawn when the player or camera is scaled or viewheight is set to MIN in first person view. It would also stop sprites from being drawn ever so slightly too early, but this isn't too much of an issue and isn't too noticeable with those values. Might look into scaling near clipping plane in accordance to camera scale in the future.
The reason for wanting to increase the near clipping plane is because the small value can cause very noticeable Z-fighting where there shouldn't be on older GPU's, usually Intel ones, that don't support 24-bits for the depth buffer.

Linux limbo

See merge request STJr/SRB2!228

Console key breakfast

See merge request STJr/SRB2!226

Turns out compiling for Linux 32-bit using the Makefiles never actually defines LINUX! Apart from that, most of the existing Linux-specific code in SRB2's source code (except for tmap.s) actually uses __linux__ instead anyway

Eat unprintable keys too, since there's no reason to feed them to G_Responder anyway when the console is open

Make CON_Responder eat Ctrl+key combos that have no effect, instead of passing the key on to G_Responder

Fix net commands not always being freed

Stop leaking names via metadata.

See merge request STJr/SRB2!223

cv_playername already has a valid default value of "Sonic". We do NOT need to expose things like this.

2.1.20 preparation

See merge request STJr/SRB2!215

Add command to restart the audio system

Closes #27

See merge request STJr/SRB2!214

P_RespawnSpecials mobj type hotfix

See merge request STJr/SRB2!217

Airbob fix backport

See merge request STJr/SRB2!219

"addfile" console command netgame fixes

See merge request STJr/SRB2!218