The acceptable runtime for tmpreaper (used by base::tmpclean on Debian
and Ubuntu) has been extended to 20 minutes globally, and the
base::tmpclean::longer class, which existed only to do that, has been
removed as unnecessary.  The longer runtime limit should not pose a
problem on any system.

Clean up formatting and comments for installed files and Puppet
manifests.

This is the (old) master branch along with the fixes to the
cron file permissions that Russ made.