new: [myc-update] allow full directory ``cron.*`` coverage of cron script deployment

bin/myc-update

@@ -61,8 +61,10 @@ docker pull docker.0k.io/letsencrypt
 EOF
 
 Wrap -d "Updating cron scripts" <<EOF || exit 1
-ln -sfn /opt/apps/myc-manage/etc/cron.d/* /etc/cron.d/
-find -L /etc/cron.d -maxdepth 1 -type l -ilname /opt/apps/myc-manage/etc/cron.d/\* -delete
+for d in /etc/cron.{d,daily,hourly,monthly,weekly}; do
+    ln -sfn "/opt/apps/myc-manage\$d/"* "\$d/" &&
+    find -L "\$d" -maxdepth 1 -type l -ilname "/opt/apps/myc-manage\$d/"\* -delete
+done
 EOF
 
 Wrap -d "Updating sysctl scripts" <<EOF || exit 1