[luatex] luatex doesn't know `TFMFONTS` environment variable

[Werner LEMBERG]

It seems that luatex only knows how to handle the `TEXFONTS` environment
variable for TFM files but not `TFMFONTS` – I did a test adding a
directory tree with

  TFMFONTS=".../foo/bar//;"

and the TFM files were not found.  Doing the same with `TEXFONTS` it
works as expected.

If this is intentional please document it.


    Werner