changed xhlatex calls in the Makefile to mk4ht xhlatex, as xhlatex
script seems to be missing in TL.I will reinstate xhlatex in tl. Darn it, I meant to do before the release this year. (I only realized belatedly that it was actually used all the time in Eitan's builds.) So our tex4ht Makefile doesn't need to be changed. (More on other stuff later.) --thanks, karl.
