PkgSrc changes:
  - Updating package for p5 modules IO::Compress, IO::Uncompress and
    derived from 2.017 to 2.018
  - Setting license to gnu-gpl-v2

Upstream changes:
  2.018 3 May 2009
      * IO::Uncompress::Bunzip2
        - The interface to Compress-Raw-Bzip2 now uses the new LimitOutput
          feature. This will make all of the bzip2-related IO-Compress modules
          less greedy in their memory consumption.
      * IO::Compress::Zip
        - Fixed exTime & exUnix2
        - Fixed 'Use of uninitialized value in pack' warning when using
          ZIP_CM_STORE.

(sno)