Re: rmail-default-file vs. (deleted) rmail-default-rmail-file

   > Can we change the default value of rmail-output-file to ~/XMAIL?
   > Since that was the default (`o' was bound to
   > rmail-output-to-rmail-file and used rmail-default-rmail-file).

   Why do you prefer XMAIL to xmail?  (A temporary setting made during
   pretest does not count.)

rmail files have always uppercase, so it makes it easy to list just
them with `ls *MAIL*'.  I find it also very confusing that `o' now
outputs to ~/xmail, when I have a ~/XMAIL that I use.