sudo: upgrade to 1.8.4

sudo: upgrade to 1.8.4

During the upgrade to 1.8.4, the UCB-licensed fnmatch.c was replaced
with a non-recursive BSD-licensed version, hence the removal of UCB
and addition of BSD in the LICENSE field. This led to checksum changes
in the doc/LICENSE file, and we now additionally track the comment
headers in redblack.c.

These changes were confirmed on the sudo mailing list:

http://www.sudo.ws/pipermail/sudo-workers/2012-February/000736.html

This upgrade also fixes CVE-2012-0809.

Signed-off-by: Scott Garman <scott.a.garman@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>