sort-coding-systems does not prefer UTF-8 over UTF-16 (and mac-roman)

[Jesper Harder]

Hi!

With the recent introduction of the new coding systems:

     mule-utf-16
     mule-utf-16-be-with-signature
     mule-utf-16-le-with-signature

`sort-coding-systems' no longer prefers UTF-8.

I think the new coding systems need to be added to the clause related to
UTF-16 in `sort-coding-systems'.

Also, UTF-8 is not preferred over mac-roman.  I think UTF-8 should
always have higher priority, since mac-roman is a highly platform
specific encoding.


In GNU Emacs 21.3.50.41 (i686-pc-linux-gnu)
 of 2003-04-09 on defun.localdomain
configured using `configure '--with-gtk''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.iso88591
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t