Since commit 89f5e98932 (support/download/svn: generate reproducible
svn archives), we've been able to generate reproducible archives, and
thus we have been able to verify the hashes for those archives.
However, the manual was not changed, and still falsely hinted that this
was not the cae.
Fix that.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>