rar 7z for dired-compress-file-suffixes and dired-compress-files-alist

[Uwe Brauer]

Hi

I was forced to generate 7z and rar archives for Windows users and
noticed that dired-compress-file-suffixes and dired-compress-files-alist
do not support these formats completely.


I have set these variables for me in order to support these formats
(provided that the relevant rar and 7z programs are installed)
accordingly and I could provide a patch. But I would like to know,
whether there are copyright issues, when adding these external programs.

Thanks and regards 

Uwe Brauer