v5.95pre7 supports font families and gfx.getfont's second return value on Linux!
sans-serif/serif/monospace/cursive now resolves to the user's preferred font of that type.
(It doesn't always match what was given to gfx.setfont. The system's FontConfig will select the closest substitute font in most cases if the requested one isn't installed. gfx.getfont returns which font is actually being used.)