symlinks warnings for joliet when mkisofs

[Karl Berry]

Hi Thomas - with xorriso 1.5.4.pl02, invoking as
  xorriso -read_mkisofsrc -as mkisofs  -pad -J -dir-mode 0755 -r my.iso .

I am now getting warnings about symlinks:
libisofs: WARNING : Cannot add /archive/12many.doc.tar.xz to Joliet tree. 
Symlinks can only be added to a Rock Ridge tree.

I think there were no warnings with earlier versions. (I don't know the
version I used to create the TeX Live images last year -- is it recorded
in the iso somewhere? Whatever was current about a year ago, anyway.) 

Anyway, since Joliet is Microsoft, I'm guessing the lack of symlink
support was always the case and xorriso just didn't warn about it
before? So I presume the only answer is not to create Joliet, i.e., no
-J?  Which is fine. I was just surprised to suddenly see them all.

Thanks,
Karl