dvips command in typerules won't do correct resolution

["Jonathan I. Kamens" <jik@kamens.brookline.ma.us>]

The dvips command in the typerules file shipped with flexfax will use
whatever its default resolution is, probably either 300dpi or 600dpi,
and the resulting PS file will suffer when converted to fax
resolution.

I solved this problem by creating two new dvips config files,
config.fax-204.00x196.00 and config.fax-204.00x98.00, configured to
use the gtfax and gtfaxlo metafont modes respectively, and then
modifying typerules to specify "-P fax-%Rx%V" to dvips.  It may be a
hack, but it's a useful hack, so it may be worth documenting somewhere
in the html :-).

Thanks,

  jik