test for hard links always fail with pdksh

[Paul McFerrin]

A new wrinkle with hard links.  If you are testing for them in pdksh, 
they will always fail.  I.E.:

   if test -L links/$filename.$inumb
   then :
   else
      ln $filename $filename.$inumb
   fi
The above test will always fail and thus will always attempt to 
re-create the hard link.

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