Bug fixes

Changes since DRUPAL-6--3-0-ALPHA1:

Development snapshot for Drupal 6.

Fixed issue 718504: checking for function exists before executing our action within hook_flag_friend()

- Contains context security fix http://drupal.org/node/723250

Fixed #702132: ThemeKey does not work properly due to the conflict with Revisions RSS. Replaced hook_init with hook_nodeapi, and general code cleanup. Has improved compatibility and performance.

Note: Because of some of the changes to this version previous feed items will have new GUIDs, making them reappear in most readers as unread.

Fixes for: