Squid 3.x proxy server.

Sample Usage :

    include squid3

    class { 'squid3':
        acl => [
            'de myip 192.168.1.1',
            'fr myip 192.168.1.2',
            'office src 10.0.0.0/24',
        ],
        http_access => [
            'allow office',
        ],
        cache => [ 'deny all' ],
        via => 'off',
        tcp_outgoing_address => [
            '192.168.1.1 country_de',
            '192.168.1.2 country_fr',
        ],
        server_persistent_connections => 'off',
    }