* lib/Makefile.am (edit, autom4te.cfg): New.
* bin/autom4te.in (BEGIN): Simplify.
Rely on `AC_MACRODIR' in addition of `autom4te_perllibdir'.
(&load_configuration): New. Use it.
(&parse_args): Support --mode, --set, and --melt.
* bin/autoconf.in: Simplify and adjust.
* tests/Makefile.am (AUTOMAKE): Use --set.
* tests/atlocal.in: Adjust.
* BUGS: distcheck and check are weak.
