Description of problem:

The bind-chroot package contains a couple of bugs.
1) It doesn't create the /dev/null device due to a spec file copy&paste error
2) When uninstalling it leaves some empty dirs behind as they aren't listed in the files section of the spec-file.

Version-Release number of selected component (if applicable):
bind-chroot-9.7.3-8.P3.el6_2.2

How reproducible:
install package / uninstall it again

Steps to Reproduce:
1. yum install bind-chroot
2. ls -la /var/named/chroot/dev/
3. yum erase bind-chroot
4. ls -la /var/named/chroot/
  

Additional info:

The '%post chroot' section of the bind spec-file contains the following bit:

  [ -e %{chroot_prefix}/dev/zero ] || \
    /bin/mknod %{chroot_prefix}/dev/null c 1 3

the check for /dev/zero is wrong and appears to be a copy&paste error, it should obviously be /dev/null.

The 'files chroot' section is missing the following lines:
%dir %{chroot_prefix}/etc/pki
%dir %{chroot_prefix}/usr
%dir %{chroot_prefix}/%{_libdir}