mds: add new squid plugin
squid: packaging and misc fixes
squid: rename submod to internet
core: add shortcut to get services module status
squid: services module integration

handleServicesModule will add a button to restart the service
after a successfull action if the services module is available.
squid: can restart after item delete
squid: improve texts
squid: improve field validation
squid: better help texts
squid: simplify option names
squid: cleanup and indentation fixes
squid: add fr_FR translation
mds: update scripts for squid module
squid: add configuration example
squid: typo fix
squid: fix indentation
core: allow to reload servces in popups
squid: reload the service instead of restart
squid: add squid.conf examples