Log Message:
Updating package for Perl 5 module WWW::Mechanize from CPAN in
www/p5-WWW-Mechanize from 1.71 to 1.72.

pkgsrc changes:
- adjust dependencies
- update some required modules first (and hopefully don't introduced
  circular dependencies)

Upstream changes:
1.72        Thu Feb  2 18:37:28 EST 2012
========================================
[DEPENDENCIES]
Bumped the HTML::Form dependency to fix failures on CentOS 5