Revert "dropped the use of @ so the generated zones would work with yadifa too. also exported env vars so child of bind_tld_zonefile_all.sh can use them" This reverts commit ab834161696a4f9150d1c8f52bb6f0f453950cb7.

#!/bin/sh

if [ x"$1" = x ]; then
 echo "Usage: $0 <cidr>" >&2; exit 255
fi

dn=$(dirname "$0")
ip=$("$dn"/cidr2ip "$1") || exit 1
"$dn"/ip2hex "$ip"