I refuse to give up the name "cv_invincibility" to another vanilla cvar that we will never use seriously.

It keeps replacing actnum with zonttl, but ONLY if zonttl is set. Weird as heck, can't figure out why, commenting out for now.

(also more item changes from last night that I just forgot to commit earlier)

Now it just cripples your chances for good items, mwaha

- Lightning cooldown reduced to 20 seconds
- You can no longer mash to get an item quicker

- 30 sec cooldown on all lightning types
- Delay before Blue Lightning hits, based off of distance
- Blue Lightning can swap targets if 1st place is passed
- Blue Lightning can only be handed out if 2nd is far away enough from first

- cmd->driftturn exists now, for figuring out how far you're turning. Added to prevent analog sticks from being able to get drift sparks faster.
- Feather bounce strafing moved to use cmd->sidemove, which means it also supports analog now.
- Braking now waits a few tics for you to be stopped for a few tics before it lets you go in reverse, as per Sev's request.
- Removed a lot of unused/redundant/commented out control code, and reorganized some of the existing code.

Splitscreen fix

For Cloud Cradle Zone, Act K

Hopefully, this should prevent instances where shells/Oni get caught on walls.

Some people like to lag up the whole server by enabling precip, so y'know what, just turn it off in netgames. Weather can just stay a Record Attack/splitscreen only feature now I guess

Instead of adding to your speed, it relatively multiplies it if you're above your top speed. This is applied to ALL of Kart projectiles as well, not just shells. May we never run into our own shell that we threw on a boost pad ever again.

This reverts commit 4c0f64ff, reversing
changes made to eaaf7083.

They give equal chance on a lot of good shit, instead of the normal boring pool of items, mwahaha

(also calls P_CheckRacers when someone spectates)

Only 1st place finish sound is global, use signpost instead of starpost

- mapgotboxes is synched
- Karma bombs/items flash while spinning out
- Karma bombs have a sound + explosion when hitting someone
- Karma bombs can no longer attempt to attack a player that is flashing and have to WAIT... again
- Fixed MT_GREENITEM's bounce sound, after breaking from last commit (WHY ARE YOU ABUSING MARIO MODE SOUNDS, STOP, AGHH)

Sonic 1, 2, 3D Blast, & CD, on top of the existing S3K and Chaotix.

Correct C FixedMul() off-by-one errors

See merge request STJr/SRB2!245

F12 fix

See merge request STJr/SRB2!250

Don't increment totalplaytime if a demo is playing.

See merge request STJr/SRB2!241

OpenGL: Map Specific Palette Fix

See merge request STJr/SRB2!247

OpenGL: Very large map rendering issue fixed

See merge request STJr/SRB2!249

Fix console typo

See merge request STJr/SRB2!246