were out of date, and we've previously seen expat.h out of sync).
*) Use new script "buildconf.sh" to create the set of generated files
(aclocal.m4, config.h.in, configure). This is intended to be used by
developers (rerun when configure.in changes) and just before a release
(releases include these outputs).
Developers now need the "autoconf" and "libtool" packages.
*) config.h.in is now built by autoheader and includes bits from acconfig.h
rather than manual construction/maintenance. (renamed from config.hin)
*) added conftools/PrintPath from the ASF; it is a portable "which"
*) added "extraclean" target to top-level Makefile to get rid of all
generated files (return to pure CVS state; before buildconf.sh)
*) updates various bits for config.hin -> config.h.in rename
*) no longer need to delete the ".deps" subdir since we don't create it
anymore (dependencies are explicit rather than auto-generated).
