OK, enclosed is the 1st step, that which generates tex4ht-dir.tex from
tex4ht-dir.m4.
That's the part I already committed (with your additional Makefile
changes). Please send step 2 :).
Ordinarily I'd be fine with your committing changes, but since this
procedure is pretty harrowing (but for a worthwhile cause), I'd like to
do it. --thanks, karl.