Make the display of palette index 255 consistent between renderers

Closes #405

See merge request !2351

Fix various issues related to texture scaling

See merge request !2329

Fix #1188

Closes #1188

See merge request !2354

Substitute MT_NULL with MT_RAY in Lua

See merge request STJr/SRB2!2302

if PNG graphics support is removed, it is not netplay compatible

See merge request !2260

Shield Button Touchups

See merge request !2257

Add and use an "instant" parameter for P_SetScale

Closes #1120

See merge request STJr/SRB2!2167

Fix console not being blocked by IT_CV_STRING

See merge request STJr/SRB2!2304

New Post-Shield-Button Gamepad Defaults

See merge request STJr/SRB2!2258

zlib and libpng are now always needed

Clean up stirngop warnings

See merge request STJr/SRB2!2356

Add printf formating

See merge request STJr/SRB2!2364

Clang: clean up conditional-uninitialized warnings

See merge request STJr/SRB2!2352

Make powerups HUD toggleable via Lua (again)

See merge request STJr/SRB2!2234

Add per-player mute

See merge request STJr/SRB2!2259

Fix banlist being cleared if server fails to start

See merge request STJr/SRB2!2379

Fix VS release project settings

See merge request STJr/SRB2!2340

Fix 3D floor sides not rendering properly if a light list was involved

Closes #1207 and #1204

See merge request STJr/SRB2!2373

Bring back WRITETHINGS, with custom filename and UDMF support!

See merge request STJr/SRB2!2339

Allow input view outside of record attack

See merge request STJr/SRB2!2020

Make NiGHTS super consistent with regular super (Closes #520 for real this time)

Closes #520

See merge request STJr/SRB2!1666

Use PF_NOJUMPDAMAGE for whirlwind jump instead of removing jump flags (resolves #771)

Closes #771

See merge request STJr/SRB2!1740