Race condition when later modules override files from earlier modules

[blee]

Files that get overridden by later modules in a recipe should never get installed to the filesystem.

For example, consider the sudoers file.

Recipe "base" does not allow the use of sudo:

base/usr/local/etc/sudoers

But recipe "sudo-wheel" allows members of group wheel to run sudo:

sudo-wheel/usr/local/etc/sudoers

And a sample recipe r:

base
sudo-wheel

Running 'confman commit' on a machine using recipe r will leave the machine in a broken state, since the base sudoers file will prevent confman commit from proceeding.

This may have rather unexpected effects for files other than sudoers as well (e.g. nsswitch.conf).