treats equal open arrays, open strings and arrays of const
    (implicitly also open) as exactly matching (since you
     cannot declare such types on their own, so they will
     never match exactly)
  * require that forward declared procedures match the
    implementation exactly for both the parameters (with
    the above modification) and result type (mantis
    #10425 and the related webtbf/tw10425a.pp)

git-svn-id: trunk@9484 -