We create autotools_config.h instead of config.h to make it clear and
avoid collisions.
We use a different method to define CSRG_BASED on BSD systems, and fix
a bug in definition of XTOOLLIB.
XTOOLLIB should probably be checked out - we should get some info from
AC_PATH_X and AC_PATH_XTRA instead of hardcoding it. To be looked at
later.
This should allow an autoregen and ./confiure to work. We only
generate Makefiles for lib/* and ./Makefile for now. We'll ad more as
we go along.
Make still fails as we need to figure out TT - tirpc lib, rpcgen,
etc. But it's a start!
