The source project of this merge request has been removed.
add functions to 550-bind_dnssec.inc.php (see https://www.howtoforge.com/communi…
…ty/threads/dnssec-problem-expire-too-soon-ispconfig-3-1.74682/#post-351381)
…ty/threads/dnssec-problem-expire-too-soon-ispconfig-3-1.74682/#post-351381)