fixing cron in #602

Updated s6overlay to v3
Note:  xz-utils was added as a requirement for s6-overlay (using safe 5.4.1 instead of compromised 5.6.x versions)

rootfs/etc/cont-init.d/01-timezone

@@ -1,4 +1,4 @@
-#!/usr/bin/with-contenv bash
+#!/command/with-contenv bash
 
 if [ -n "${TZ}" ]
 then

rootfs/etc/cont-init.d/50-cron-config

@@ -1,4 +1,4 @@
-#!/usr/bin/with-contenv bash
+#!/command/with-contenv bash
 
 # Cron runs in its own isolated environment (usually using only /etc/environment )
 # So when the container starts up, we will do a dump of the runtime environment into a .env file that we
@@ -12,4 +12,4 @@ COLLECTOR_CRON_SCHEDULE=${COLLECTOR_CRON_SCHEDULE:-"0 0 * * *"}
 [[ "${COLLECTOR_CRON_SCHEDULE}" == \"*\" || "${COLLECTOR_CRON_SCHEDULE}" == \'*\' ]] && COLLECTOR_CRON_SCHEDULE="${COLLECTOR_CRON_SCHEDULE:1:-1}"
 
 # replace placeholder with correct value
-sed -i 's|{COLLECTOR_CRON_SCHEDULE}|'"${COLLECTOR_CRON_SCHEDULE}"'|g' /etc/cron.d/scrutiny
+sed -i 's|{COLLECTOR_CRON_SCHEDULE}|'"${COLLECTOR_CRON_SCHEDULE}"'|g' /etc/cron.d/scrutiny