The demo subdirs

[Tim Van Holder]

Some problems with the configuration of the demo subdirs: by
default, only libltdl is (sub)configured.  Unfortunately, the
demo dirs are added to DIST_SUBDIRS in the top-level Makefile.am,
so 'make distclean' ends up being broken unless the demo dirs are
configured.
Using AC_CONFIG_SUBDIRS on them in configure.in is easy
enough, but leads to another problem.  After a bootstrap,
ltmain.sh and Makefile are both missing; re-running
configure would then fail to create libtool in each of the
directories (which is bad, given that some of their configures
run libtool), so this would require

  ./config.status --recheck
  ./config.status
  make ltmain.sh

before being able to run a full configure again.
Perhaps 'bootstrap' could run the above three commands if
a config.status is found?
Or am I simply wrong in running bootstrap in an already configured
tree?