PATCH: Correct diff-generation in release scripts

[Mark Mitchell]

>> Yes, if you put a key without a passphrase in ~gccadmin/.ssh.  If that's
>> considered unsafe, you can write a little script to use in place of scp,
>> or add logic to allow you to get the old behavior.  This new logic allows
>> the same code to upload the release to both ftp.gnu.org and gcc.gnu.org.
>
> Please do make the appropriate fixes, in time for the next snapshot.

The old interface would have been fine if had been satisfactorily
documented.

Please just revert my change on the mainline and update releasing.html
to indicate what to do.

Thanks,

-- 
Mark Mitchell                mark@codesourcery.com
CodeSourcery, LLC            http://www.codesourcery.com