Fix pausing then refocusing the window causing the music to stay muted

See merge request KartKrew/Kart-Public!244

If the game is paused, music will be resumed when unpause anyway.

R_FindPlane optimization

See merge request !242

Download files if they are found with wrong checksum

See merge request !238

Mute music instead of pausing if lose focus

See merge request !235

Command for http downloads with basic auth

See merge request KartKrew/Kart-Public!233

Fix servers having a long delay before starting

See merge request KartKrew/Kart-Public!236

Implement STUN for fetching your public IP address for RPC

See merge request !237

It gets pushed forward for ASKINFO.

unsigned int is always 4 bytes on windows btw, so this should align properly.

RFC 5389 is a standard protocol that can be used for this instead of ip4.me.

I may have gone overboard on the CSPRNG... It was fun though.

Open lua files in srb2home

See merge request !234

Fix engine sound volume

See merge request !231

Link with exchndl, instead of dynamically loading it.

See merge request !230

Kill some nonsense

See merge request !232

Fix engine sounds' dampening to a sane value, now that the bug preventing it from working properly was fixed.

You can hear engines in 16P again, but it's not as obnoxiously loud as it was before. Additionally, I commented this function better.

It caused problems with crash reports not being made if the current working directory gets changed. Not even recommended anymore per the drmingw readme
https://github.com/jrfonseca/drmingw#exchndl

Disable Discord Rich Presence on dedicated servers

See merge request !229

Move master server presence updates to Advertise_OnChange

See merge request !227

Make "divide by zero" or "modulo by zero" errors show the file and line of where it happened

See merge request !228

Shouldn't break scripts as it stops execution as soon it happens, like it already does.

This will probably call DRPC_UpdatePresence slightly less?

Rename the "small" variable to "isSmall"

See merge request !226

Reported by MK, apparently "small" is considered a data type for some systems. After a little bit of research, apparently it can happen when including <windows.h>... whatever, just rename the variable :p

(cherry picked from commit 6f51c68c7248d616ad16f66b72cfcc36b7c952f5)

This should work for mingw and linux so far.

(cherry picked from commit f92026f9)

(cherry picked from commit 9495e635)

(cherry picked from commit ef2bff6383b16385f9874e1c9c6b66c9df794f5b)

(cherry picked from commit 4059c6a6)