Special release fo 1.21.10 to fix some of the shader bugs present in 0.2.6 This release is backported and may contain other unexpected issues

• ssao tweeks
• renderdoc fix
• dont use sparse on linux nv
• special case darkness/blindness effect even when no fog rendering is enabled
• incorrect sampler fixes
• fixes for intel linx
• sampler fixes for shader depth buffers
• critical fix for lods loading incorrectly when joining and leaving different servers (1.21.11)
• cpulayout should now never cause the game to crash even on failure
• set the default lod block lighting to full sky no blocklight
• dont log stacktrace on sqlite load fail