X utilites and modules need an index for each directory of font
files added.
fonts.scale maps the X font identifiers to their scalable font
files.
count-of-font-file-lines
font-file -foundry-family-weight-slant-...-pixelsize-pointsize-xresolution-yresolution-...-registry-encoding
font-file -foundry-family-weight-slant-...-pixelsize-pointsize-xresolution-yresolution-...-registry-encoding
font-file -foundry-family-weight-slant-...-pixelsize-pointsize-xresolution-yresolution-...-registry-encoding
font-file -foundry-family-weight-slant-...-pixelsize-pointsize-xresolution-yresolution-...-registry-encoding
...