* Patch from Dr. Zini to add link() and backlink() to globlists. This allows

* Patch from Dr. Zini to add link() and backlink() to globlists. This allows
  for some handy stuff like:
  - Using links as a kind of tag; creating blog pages that list all pages
    containing a given tag/link or not containing some other tag.
  - Subscribing to mail notifications whenever a change is made to a page
    that is a backlink of page foo. Ie, "Please notify me of changes in all
    pages that link to my home page in the wiki"
  - Locking any pages that are linked to from a particular page, so that
    lists of locks can be exposed in the wiki.