+ contrib/hbexpat/3rd/expat/expat.dif
* contrib/hbexpat/3rd/expat/expat.hbp
+ Added .dif file.
* contrib/hbhpdf/3rd/libhpdf/libhpdf.dif
* Updated .dif file.
; NOTE: Previous failures were caused by .hbs extension being
associated with hbrun and I relied on this when running
hb3rdpat.hbs. It wouldn't work this way, and I experienced
various unexpected behavior in such case with other scripts
too in the past. So moral of the story, always use
'hbrun <name>.hbs', at least on Windows.