Log Message:
Updating devel/p5-Set-Object from 1.27nb1 to 1.28

pkgsrc changes:
- add license definition

Upstream changes:
1.28, 22 Jul 2010
    * Fixed a portability concern for some platforms' C compilers
      (that do not support //-style comments) - RT#52690
    * Valid SIGNATURE file - RT#50492