You know, for compatibility.
Like some sort of .remap file in scripts that the
engine parses and does some string replace so it'll load another file instead
if it is missing, and the cgame/game modules don't even know it.
models/players/sarge/animation.cfg models/players/sorceress/animation.cfg
models/players/sarge/icon_default.tga models/players/sorceress/icon_default.tga
models/players/sarge/lower.md3 models/players/sorceress/lower.mdr
and maybe even apply to missing map textures
textures/xcsv/nonfree1 textures/oatextures/realcooltexture.jpg
textures/xcsv/nonfree2 textures/oatextures/coolertexture2.tga
... and so on.
Also it shouldn't seek for these remapped files first to avoid duplicates (in the player model list menu for example)