Revive this script.
It wasn't doing anything useful, since $all_programs wasn't being
defined by the invoking Makefile.am.
Reflect that nohup is no longer a script, so don't exclude it.
Add framework to handle the programs added since it was last run:
kill, stat, unlink, [, link, readlink.
Fix path-related problems deriving from the move of this script
from src/ to its present location.
(using test -c) as well as being writable, before trying to write to it.
Otherwise, the test could mistakenly append a newline to an existing,
regular, writable, /dev/full file.
Suggested by Ulrich Drepper.
