Replace some Wiki links
    
    Replace some links to old Wiki pages that redirect to docs.fp.o with
    the redirect targets.
    
    Wiki link to _Forbidden Items_ page is completely removed. That Wiki
    page does not have a redirect, just a notice that the page is obsolete
    and a link to the new legal docs. Since the new legal docs do not have
    a corresponding page, the Forbidden Items page is really old, and there
    does not seem to be anything there that could not be derived from the
    general rules, the page really seems obsolete without replacement, thus
    any reference to it can be removed.