Log Message:
pkgsrc changes:
  - Updating package for p5 module Storable from 2.18nb1 to 2.20

Upstream changes since 2.18:
Mon May 18 09:38:20 IST 2009   Abhijit Menon-Sen <ams@toroid.org>

    Version 2.20

	Fix bug handling blessed references to overloaded objects, plus
	other miscellaneous fixes.

	(Version 2.19 was released with 5.8.9.)