[Groff] adding non-native font directories [Was: fontconfig]

[SGT. Garcia]

thanks for clarifying. my question however is aiming at something
different. i think i should have asked: is it possible to use any font
other than the ones that come with groff. following some other pointer i
came across heirloom project and some hints here and there about TROFFONTS
environment variable. has there been any implementation of that in groff?

for those who know what TROFFONTS does in heirloom troff, does it do what
i'm asking for? i.e. does it allow to specify directories other than the
one native to troff and use fonts in those directories?