Since tar *will* generate different archives, virtually all hashes will
change, so drop the blurb that states they usually would not.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
[Arnout: say explicitly that the has will change]
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
