Co-authored-by: TehRealSalt <tehrealsalt@gmail.com>

Please, for the love of God, Jesus and Bastet, ADD EVERY OPENGL COMMAND REGARDLESS OF THE FREAKING RENDERER!!!!!!!!!!!!!!!!!!!!!!!!!!!

memset SERVERINFO maptitle

See merge request STJr/SRB2Internal!624

Don't flush every texture just because the palette MAY have changed

Merge branch 'opengl-is-a-bad-renderer' of https://git.magicalgirl.moe/STJr/SRB2 into opengl-is-a-bad-renderer

Fix All the buidlbot issues

See merge request STJr/SRB2!520

(done by calling HWR_LoadTextures, which in turn calls HWR_FreeTextureCache)

Actually don't even call HWR_FreeMipmapCache between levels because I feel like it's futile outside of PWAD loading