The Zlib bundled (and used by PS) is, as per, zlib/ in source tree, was
last updated upstream (mysql upstream) for version 1.2.3 (July 2005),
the latest zlib upstream one being 1.2.7 (May 2012).
Similarly, the readline bundled is 5.2 whereas the latest
readline upstream version is 6.2
The Zlib bundled (and used by PS) is, as per, zlib/ in source tree, was
last updated upstream (mysql upstream) for version 1.2.3 (July 2005),
the latest zlib upstream one being 1.2.7 (May 2012).
Similarly, the readline bundled is 5.2 whereas the latest
readline upstream version is 6.2