Update to 0.50:

0.45    Mon Sep  8 09:13:14 MDT 2008
  -Patch from Milosz Tanski <mtanski@gridapp.com> to make module
  thread-safe on linux (rt.cpan.org ID 38709). Patch from Scott
  Davis <darkpreludesi@hotmail.com> for new constructor flag
  enable_ttys, which when set to 0 disables traversing the
  device tree.

0.46    Fri, Oct 19 2012
  -Initial release by new maintainer jswartz, identical to 0.45 except for meta
        files and README
0.47 16 Feb. 2013
  -Initial releas by new maintainer jwb. Incorporated meta file updates from
  Jonathan Swartz <swartz@pobox.com>. Closed a bunch of bugs: Patch from
  Christian Boitel <christian.boitel@gmail.com> (fixes #51470); added
  suggestion from Opera Wang <Opera.Wang@synopsys.com> (fixes #51470 even
  more); patches from Michael Schilli (MSCHILLI) (fix #41397, #46861 and
  #58236), work on perl w/o threads; pulled commits from Slaven Rezić
  <SREZIC@cpan.org>, use kvm implementation for FreeBSD >= 6.0 (closes #68405
  and #16978); fixed bug #69397, fh not closed; fixed RT #72862, unsafe use of
  /tmp; added tests;

0.48
  -Pulled commits from Chris Williams <chris@bingosnet.co.uk>, fixes build
  errors on NetBSD and OpenBSD. Fixed #72862 (byte order tag in cache file),
  applied patch to fix #67224 (cygwin PID_ORPHANED) by <rurban at x-ray.at>.
  Pulled FreeBSD patches from Slaven Rezić <SREZIC@cpan.org>;
  Pulled from David Zaebst <zaebst@gmail.com>): Fixes to stay accurate on
  machines with many cpus (#82175), to include system time into calculations
  (#80391) and others (#81312, #82175 and #80391) and to fix unknown process
  states for debian kernels #71976. Tried to get it compiling under
  MidnightBSD.
0.49
  -Fixed #61946 (odd process names), solution by Bernd Kallies. Fixed #48445, patch from
  Guillaume Rousse. Pulled fixes from Opera Wang. Fixed typos discovered by
  Salvatore Bonaccorso, David Steinbrunner and HMBRAND. Fixed #89117, patch
  from yyang. Got it (hopefully) running under kfreebsd.

(wiz)