web ui: call nethserver-squid-save after bypass rules modification. Refs #2072
firewall templates: enable Squid rules only is status is enabled. Refs #2111
/etc/shorewall/rules template: open ports 80 and 443 if Squid mode is transparent(_ssl). Otherwise no http traffic is possible. Refs #2111
db defaults: remove Runlevels prop. Refs #2067