bfsetup: fix incorrect comment

 
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            @@ -40,8 +40,8 @@
                     return super(kbfilesrepo, self)._callstream(cmd, **args)
         repo.__class__ = kbfilesrepo
 
-    # bfiles doesn't support non-local repositories -- get out quick in
-    # such a case
+    # wire repositories should be given new wireproto functions but not the
+    # other bfiles modifications
     if not repo.local():
         return bfproto.wirereposetup(ui, repo)