- Update to 0.48
  - Make module thread-safe on linux (CPAN RT#38709)
  - New constructor flag enable_ttys, which when set to 0 disables traversing
    the device tree
  - New maintainer JSWARTZ
  - Fix reading process command lines (CPAN RT#51470)
  - Fixes for non-threaded perls (CPAN RT#41397, CPAN RT#46861, CPAN RT#58236)
  - Fix file descriptor leak (CPAN RT#69397)
  - Fix unsafe use of /tmp (CPAN RT#72862, CVE-2011-4363)
  - Various fixes for non-linux operating systems
  - Fix byte order tag in cache file (CPAN RT#72862)
  - Fixes to stay accurate on machines with many CPUs (CPAN RT#82175), to
    include system time into calculations (CPAN RT#80391) and others
    (CPAN RT#81312, CPAN RT#82175 and CPAN RT#80391)
  - Fix unknown process states for debian kernels (CPAN RT#71976)
  - Added tests
- Drop ARG_MAX patch, no longer needed
- Don't use macros for commands
- Don't need to remove empty directories from the buildroot
- Don't ship empty TODO file
- Drop %defattr, redundant since rpm 4.4
- Specify all dependencies
- Add %{?perl_default_filter}