We rely on the include path to find many of these headers. It
especially doesn't make sense to use #include "foo.h" for headers
in the top-level include directory.
The sudoers file must now explicitly allow the user to specify a
directory (sudo -D) or chroot (sudo -R) by setting cwd or chroot
to "*". If a specific cwd or chroot value is set in sudoers, the
user may not use the -D or -R options, even if they match the value
in sudoers.
