Log Message:
Update www/drupal from 6.16 to 6.17.

Drupal 6.17, 2010-06-02
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- Improved PostgreSQL compatibility
- Better PHP 5.3 and PHP 4 compatibility
- Better browser compatibility of CSS and JS aggregation
- Improved logging for login failures
- Fixed an incompatibility with some contributed modules and the locking system
- Fixed a variety of other bugs.