[documentation] New vocabulary for handbook pages

[Addison Berry]

We've added a new vocabulary for handbook pages to indicate the  
status, pursuant to this issue: http://drupal.org/node/304826

It is under the existing Drupal version vocab on the node add/edit  
page and is optional. This will allow us to give some indication to  
folks of what is going on with the page as well as letting us create  
lists of pages that "need love". Please note that if you mark a page  
with Insecure code, you should unpublish the page until it gets fixed.  
Now that we have mandatory logs, that is a prime place to put an  
explanation of the reason for changing the status, if it isn't  
apparent. ;-)

If you think that there are other tags which may be useful, please  
open a new issue in the webmasters queue.

Thanks to all that help hash this one out. :-)
- Addi (add1sun)