Adds back the "Loading file" message when a file is loaded
Adds individual file errors for things loaded with W_InitMultipleFiles (-file param)
Errors for a given file will now appear between "Loading file" and
the "Added file" or "not adding file" messages, making troubleshooting easier

Error checking for running out of freeslots

See merge request KartKrew/Kart-Public!267

Uses loop variable to determine error condition
Also small change to lib_freeslot for SFX for consistent use of I_Error

Add my full name in the credits

See merge request KartKrew/Kart-Public!264

Discord Invite Fixes + DUMPCONSISTENCY flag for makefile

See merge request KartKrew/Kart-Public!255

DRPC: Wait for join secret to be ready

See merge request KartKrew/Kart-Public!248

Replace gamma shortcut with a fullscreen toggle

See merge request KartKrew/Kart-Public!254

Fix unnecessary texture reloads on respawn in opengl

See merge request KartKrew/Kart-Public!251

Fix RA crash

See merge request KartKrew/Kart-Public!250

Fixes a crash that can happen when starting RA attempts if you press
keys/buttons that would cancel a netgame connection

If the join secret isn't ready right away, wait for the next update instead of trying to loop for it again immediately

I believe this may be the cause of the invite crash some people have noticed in master, but I'm not sure, needs tested.

Add large address aware flag

See merge request KartKrew/Kart-Public!246

This allows the final exe to use more than 2gb of RAM in a 64-bit system
which should get rid of most out of memory errors on 32-bit builds

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 KartKrew/Kart-Public!242

Download files if they are found with wrong checksum

See merge request KartKrew/Kart-Public!238

Mute music instead of pausing if lose focus

See merge request KartKrew/Kart-Public!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 KartKrew/Kart-Public!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 KartKrew/Kart-Public!234

Fix engine sound volume

See merge request KartKrew/Kart-Public!231