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/usr/share/zentyal/stubs/dns/named.conf.options.mas is in zentyal-dns 2.3.10+quantal1.

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<%args>
  @forwarders
  $keytabPath => undef
</%args>
options {
    directory "/var/cache/bind";

    // If there is a firewall between you and nameservers you want
    // to talk to, you might need to uncomment the query-source
    // directive below.  Previous versions of BIND always asked
    // questions using port 53, but BIND 8.1 and later use an unprivileged
    // port by default.

    //query-source address * port 53;
    //transfer-source * port 53;
    //notify-source * port 53;

% if ( @forwarders > 0 ) {
    // If your ISP provided one or more IP addresses for stable
    // nameservers, you probably want to use them as forwarders.
    forward first;
    forwarders {
%   foreach my $forwarder (@forwarders) {
        <% $forwarder %>;
%   }
    };
% }

% if (defined $keytabPath) {
    tkey-gssapi-keytab "<% $keytabPath %>";
% }

    auth-nxdomain no;    # conform to RFC1035

    allow-query { any; };
    allow-recursion { trusted; };
    allow-query-cache { trusted; };
};