Update for Italian language and Fix for autoupdate messages

In this pull request
- Updated italian translation
- Fix for autoupdate enabled/disabled message

**NB**: in the English language file the row #150 is duplicated on row #151
> 'DNS domains' => 'DNS Domains',
'DNS domains' => 'DNS Domains',

In other languages (not all) the 2 rows are like
> 'DNS Domains' => 'DNS Domains',
'DNS domains' => 'DNS domains',

With the italian translation i followed the last example but i don't know if *DNS Domains* is really needed