Including tar files
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If the remote file (Note:FTP) is a compressed tar file, you can
use `C-c C-m C-t' (`mh-mhn-compose-external-compressed-tar'). Then, in
addition to retrieving the file via anonymous _ftp_, the file will also
be uncompressed and untarred. You are prompted for the remote host and
pathname and the content description. The pathname should contain at
least one `/' (slash), because the pathname is broken up into directory
and name components.