[FIX] tracker items: at least add rel="nofollow" to prevent Google from auto-rating when Anonymous allowed to vote/rate the stars (thanks amette for the hint - done for 9.x only as 12.x and up does not seem to be affected - code refactored)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/9.x@51650 b456876b-0849-0410-b77d-98878d47e9d5