core70: cleanup of /config/rootfiles/core/70/filelists/file, increased version number to 70 in make.sh.
copied core 68 dir to 70
core70: added openvpnctrl and /etc/init.d/firewall to files
squid: Speed up the stop process.

The squid proxy server has been blocked by unresponsive redirectors and it took ages to kill it in the past.

To speed up the shutdown process, we will stop all redirector services at the same time. If the squid service
is still running we will wait up to 30 seconds before a TERM and finaly a KILL signal will be sent.

Fixes #10368.
Core70: Added message "update needs a reboot" because of new firewall script
Merge remote-tracking branch 'stevee/squid-fast-shutdown' into next
core 70: Add squid initscript.