It is suffering some bitrot and I don't feel like fixing it right now, but
it causes problems for people trying to build QF. This should be ok because
it's one of those "if uncertain, say no" things.
While it further breaks RPM building, all AC_SUBST(HAVE_*) have been nuked.
When AM_SUBST_NOTMAKE, tell automake to not generate var = @var@ in
Makefile.in for qf specific vars (QF_SUBST is a wrapper for AC_SUBST that
also calls AM_SUBST_NOTMAKE).
Most of the guts of configure.ac have been moved to config.d and are then
brought in by m4_include. This will make maintaining configure.ac much easier.
Also drop use of PROGRAM and VERSION, using PACKAGE_NAME, PACKAGE_VERSION, and
on occasion, PACKAGE_STRING instead, and clean out some old files we no longer
need.
