#32 Missing RI_XXX constants for search-paths

[Aron Gombas]

I see only 4 of them in the HPP:

EXTERN(RtToken) RI_ARCHIVE;
EXTERN(RtToken) RI_PROCEDURAL;
EXTERN(RtToken) RI_RESOURCE;
EXTERN(RtToken) RI_DISPLAY;

...so what about RI_TEXTURE="textures" and
RI_SHADERS="shaders"?

(Note: Oops, if I pass RI_SHADER, it seems working, but
then the documentation might be wrong?!)