configury: run automake without --foreign flag.

* configure.ac (AM_INIT_AUTOMAKE): Remove foreign.
* bootstrap.conf (luaposix_force_changelog, luaposix_finish):
Remove.  Bootstrap handles this automatically.
(luaposix_force_readme): Distribute README file.
* .gitignore: Add README.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
slingshot: update.

* slingshot: Update to version with spurious gitmodule output
from sanity checks fixed, and improved release branch cleanup.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
configury: distribute config.ld.

* local.mk (EXTRA_DIST): Add config.ld, and various example files.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
Release version 29

* NEWS: Record release date.