[Bug-gnu-emacs] another rmail suggestion

[phr-2000]

    Info: (emacs)Rmail Reply   reads:

       You can exclude certain recipients from being placed automatically in
    the `CC', using the variable `rmail-dont-reply-to-names'.  Its value
    should be a regular expression (as a string); any recipient that the
    regular expression matches, is excluded from the `CC' field.  The
    default value matches your own name, and any name starting with
    `info-'.  (Those names are excluded because there is a convention of
    using them for large mailing lists to broadcast announcements.)

Rmail should either optionally or by default, omit from the cc field
any address that's already in the to: field.  A friend of mine always
cc's her outgoing messages to herself, so email I get from her looks like:

   From: xyz
   To: phr
   Cc: xyz
   ...

When I use "reply" in rmail, the reply by default looks like:

  To: xyz
  Cc: xyz

and then she gets two copies of the reply sent to her unless I edit the 
cc field or remember to use "1 r" instead of "r".