Partially reverts the following commits:
9f2a61c59cc4e4ce278e6582cb4bdca9c2088755
9c13fe6604358e5255457422acbe8e03734f1e44
As @edolstra pointed out, it would make more sense to do this by default
instead of having that allowImpurePaths option. This of course might
break systems which add extra packages to udev, but on the upside it's
hard to miss one of these paths now because it won't get buried in the
ocean of build output lines.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
c10a17a3eb