replace checkout with content_lock

Committee or Team: 
Web Design
Component: 
Drupal configuration
Version: 
Drupal 6 Live
Date: 
05/26/2012
Author(s): 
Walt Daniels
Details: 
replace checkout with content_lock because there is no d7 version of checkout. The two behave essentially the same except content_lock has a feature to timeout locks, set to 2 day currently.