use POSIX qw(EXIT_FAILURE);
use Tie::IxHash;
-# Debug
-use Data::Dumper;
-
# Documentation links
#XXX: see https://letsencrypt.github.io/acme-spec/ (probably based on https://ietf-wg-acme.github.io/acme/)
#XXX: see jwk rfc http://www.rfc-editor.org/rfc/rfc7517.txt