#108671 patch by nodestroy: fixes bugs with multiple requests by moving from forms to links with confirmation questions

Fix warning that is issued when no administrator mail address is set for the site. The previous implementation didn't work without clean URLs

renamed the list tab to buddylist, so that it is also configurable through the buddylist translations

let blocks and buddylist user settings disappear if the user has no permission to maintain a buddylist and disallow access to buddylist if so

#80116 patch by ankur #26: Prevent the "add user to my buddylist" link from appearing if a request is pending

 #80166 by ankur: optional workflow to send request emails to the user who must approve or deny the request to become buddies

A Drupal 5.0 version of buddylist for people to test. Guaranteed to be bugs, not ready for production.