[tex-live] Wrong Link within README of TL2008

[Karl Berry]

     > the link "Listing of the master directory on tug.org" at the end of
     > 
     > file systems/texlive/tlnet/2008/README points to
     > 
     > ftp://tug.org/texlive/tlnet/tldev/ , which seems to be probably wrong.

I fixed it.  Thanks for the report.