s bash -c 'shopt -s nullglob; for f in /etc/bind/*.key /etc/bind/*.private /etc/bind/key.*; do chgrp bind $f; done'
if [[ -e /etc/caldav-htpasswd ]] && getent group www-data &>/dev/null; then
s chgrp www-data /etc/caldav-htpasswd
s bash -c 'shopt -s nullglob; for f in /etc/bind/*.key /etc/bind/*.private /etc/bind/key.*; do chgrp bind $f; done'
if [[ -e /etc/caldav-htpasswd ]] && getent group www-data &>/dev/null; then
s chgrp www-data /etc/caldav-htpasswd