update for ftp-upload script documentation

[Ward Vandewege]

Currently,

  http://www.gnu.org/prep/maintain/maintain.html#Automated-Upload-Procedure

says:

==================================================================

1. The file to be distributed (for example, foo.tar.gz).
2. Detached GPG binary signature for (1), made using ‘gpg -b’ (for
example, foo.tar.gz.sig).
3. A clearsigned directive file, made using ‘gpg --clearsign’ (for
example, foo.tar.gz.directive.asc). 

==================================================================

I'd like to clarify that a bit, like so

==================================================================

1. The file to be distributed (for example, foo.tar.gz).
2. Detached GPG binary signature for (1), made using ‘gpg -b’
on the file to be distributed (for example, foo.tar.gz.sig).
3. A clearsigned directive file, made using ‘gpg --clearsign’ on
the directive file (for example, foo.tar.gz.directive.asc).

==================================================================

It would also be good to insert a line (separate paragraph) with a link to
the page that describes the directive file right after point three. Something
along the lines of

==================================================================

The directive file format is described here.

==================================================================

with the word 'here' replaced as a link to the FTP Upload Directive File -
v1.1 page.

Thanks,
Ward.

-- 
Ward Vandewege <address@hidden>
Free Software Foundation - Senior System Administrator