checksums
-temprelease=$(mktemp)
+temprelease=$(mktemp ${TMPDIR:-/tmp}/tmp.XXXXXXXXXX)
trap "rm -f $temprelease" EXIT
set -e
head -n$(( $(grep -n '^-----BEGIN PGP SIGNED MESSAGE-----$' website/download.mdwn | head -n1 | cut -f1 -d:) - 1 )) website/download.mdwn >$temprelease