Import bzip2 1.0.2
from http://www.bzip.org
Re-import bzip2-1.0.5 in more appropriate location.
Import bzip2-1.0.6:

1.0.6 (6 Sept 10)
~~~~~~~~~~~~~~~~~

* Security fix for CVE-2010-0405.  This was reported by Mikolaj
  Izdebski.

* Make the documentation build on Ubuntu 10.04