If the cylinder description starts with D%d we test if the size in
description matches the cylinder size. If the cylinder size is double
compared to size in description, we mark the dive as double tank dive to
divelogs.de.
Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>