pkgsrc fixes
* Let to use system bzip2 library instead of included one,
same as p5-Compress-Raw-Zlib.
CHANGES
-------
2.033 11 Jan 2011
* Fixed typos & spelling errors.
[perl# 81782]
2.032 4 Jan 2011
* No Changes
2.031 21 September 2010
* Updated to use bzip2 1.0.6
Version 1.0.6 removes a potential security vulnerability,
CVE-2010-0405, so all users are recommended to upgrade immediately.
