- Swap order of Silver & Gold, for menu appearances & bug fixing
- Ensure that totalplaytime and matchesplayed aren't kept when M_ClearSecrets getss called in M_EraseDataResponse
- Set sensible defaults for emblem sprite/color

- Added silver time medals for the new maps
- Added gold dev time medals for all maps
- Added 4 more matches played milestone medals
- Changed requirements for most silver time medals to be easier, especially in the early game
- Made all unlockable requirements higher, in both medals & matches, to balance out with the additional medals and make sure stuff is unlocked further into the first release week

Clean-up of unused/removed sfx, replacement of the last remaining Mario sfx, and new sfx in some spots

- Replaced eggitem landing sfx
- Replaced banana landing sfx
- Replaced item tossing sfx
- Replaced item clashing sfx
- Added sfx for drift spark tier changing
- Added sfx for brake drifting
- Reverted Mario Mode sound replacement back to vanilla

Merge In Vanilla Next

See merge request KartKrew/Kart!87

# Conflicts:
#	src/d_main.c
#	src/d_main.h
#	src/d_netcmd.c
#	src/doomtype.h
#	src/hardware/hw_md2.h
#	src/p_user.c
#	src/r_splats.h
#	src/s_sound.c
#	src/s_sound.h
#	src/screen.c
#	src/sdl/i_system.c

OpenGL new clipping backport

See merge request !315

Alias recursion hotfix

See merge request STJr/SRB2!314

Compiling cleanup and fixes

See merge request STJr/SRB2!311

Three more CV_NOSHOWHELP's I missed the first time around. (Not making another exe for this, it'll show up the next time one is made... not that important.)

Improved "HELP" command

See merge request KartKrew/Kart!82

Made some efforts to improve efficiency of new code, hard to tell if I've made it better or worse though honestly

R_IsEmptyLine is now a thing too btw

More progress, NEWCLIP added to doomdef.h, sadly it actually all lags the game so I've disabled it for now

Other notes:
* on second thought I'll keep the hw_clip functions' gld prefixes rather than HWR, not like it matters either way
* despite the extra lag it does fix the issues with translucent walls and such when displayed at different vertical angles, such as with the GFZ1 waterfall

Other notes:
* Renamed all new functions to have HWR_ prefix instead of gld_, for consistency
* HWR_FrustrumSetup and HWR_SphereInFrustum are disabled and require HAVE_SPHEREFRUSTRUM. This is because 1) SRB2CB did not need the code, so presumably neither will we, and 2) there are some OpenGL API functions used there that due to our way of using OpenGL we don't use outside of r_opengl.c, which makes dealing with HWR_FrustrumSetup complicated in theory
* The new clipping functions are not added to OpenGL's "main" rendering code itself just yet, they're just available to use now once hw_clip.h is included

Opengl improvements backport

See merge request !304

Update readme

See merge request !313

Update copyright info

See merge request STJr/SRB2!309

Place limit on the amount of alias recursion allowed, to prevent cycles or otherwise excessive recursion

Hide the numlaps change message in record attack. (It plays every time you load a demo of a map with a differing quantity of laps to the default value...)

* Fix spectators having the "YOU ARE THIS PERSON" highlight on the minirankings be done on the person in first.
* Apply the "YOU ARE THIS PERSON" highlight to all non-splitscreen circumstances that use the tiny player icons. (New locations: Tab rankings, intermission, completed votes.)