Documentation references sha1sum

[Robert Wuest]

I just got an email from a friend trying to install F11.  He points out 
that the documentation tells you to run sha1sum instead of the correct 
sha256 sum. (Actually he didn't say it quite that nicely :).

I can only find this one page: 
http://docs.fedoraproject.org/install-guide/f11/en-US/html/sn-expert-download.html

He says he followed directions for using a windows sha1sum.exe, but I 
can't find that page.

Anyway, the documentation needs to be corrected.

Robert