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 - Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 -
 - This Source Code Form is subject to the terms of the Mozilla Public
 - License, v. 2.0. If a copy of the MPL was not distributed with this
 - file, You can obtain one at http://mozilla.org/MPL/2.0/.
 -
 - See the COPYRIGHT file distributed with this work for additional
 - information regarding copyright ownership.
-->

<!-- Generated by doc/misc/docbook-options.pl -->

<programlisting>
<command>options</command> {
	<command>allow-new-zones</command> <replaceable>boolean</replaceable>;
	<command>allow-notify</command> { <replaceable>address_match_element</replaceable>; ... };
	<command>allow-query</command> { <replaceable>address_match_element</replaceable>; ... };
	<command>allow-query-cache</command> { <replaceable>address_match_element</replaceable>; ... };
	<command>allow-query-cache-on</command> { <replaceable>address_match_element</replaceable>; ... };
	<command>allow-query-on</command> { <replaceable>address_match_element</replaceable>; ... };
	<command>allow-recursion</command> { <replaceable>address_match_element</replaceable>; ... };
	<command>allow-recursion-on</command> { <replaceable>address_match_element</replaceable>; ... };
	<command>allow-transfer</command> { <replaceable>address_match_element</replaceable>; ... };
	<command>allow-update</command> { <replaceable>address_match_element</replaceable>; ... };
	<command>allow-update-forwarding</command> { <replaceable>address_match_element</replaceable>; ... };
	<command>also-notify</command> [ port <replaceable>integer</replaceable> ] [ dscp <replaceable>integer</replaceable> ] { ( <replaceable>masters</replaceable> |
	    <replaceable>ipv4_address</replaceable> [ port <replaceable>integer</replaceable> ] | <replaceable>ipv6_address</replaceable> [ port
	    <replaceable>integer</replaceable> ] ) [ key <replaceable>string</replaceable> ]; ... };
	<command>alt-transfer-source</command> ( <replaceable>ipv4_address</replaceable> | * ) [ port ( <replaceable>integer</replaceable> | * )
	    ] [ dscp <replaceable>integer</replaceable> ];
	<command>alt-transfer-source-v6</command> ( <replaceable>ipv6_address</replaceable> | * ) [ port ( <replaceable>integer</replaceable> |
	    * ) ] [ dscp <replaceable>integer</replaceable> ];
	<command>answer-cookie</command> <replaceable>boolean</replaceable>;
	<command>attach-cache</command> <replaceable>string</replaceable>;
	<command>auth-nxdomain</command> <replaceable>boolean</replaceable>; // default changed
	<command>auto-dnssec</command> ( allow | maintain | off );
	<command>automatic-interface-scan</command> <replaceable>boolean</replaceable>;
	<command>avoid-v4-udp-ports</command> { <replaceable>portrange</replaceable>; ... };
	<command>avoid-v6-udp-ports</command> { <replaceable>portrange</replaceable>; ... };
	<command>bindkeys-file</command> <replaceable>quoted_string</replaceable>;
	<command>blackhole</command> { <replaceable>address_match_element</replaceable>; ... };
	<command>cache-file</command> <replaceable>quoted_string</replaceable>;
	<command>catalog-zones</command> { zone <replaceable>string</replaceable> [ default-masters [ port <replaceable>integer</replaceable> ]
	    [ dscp <replaceable>integer</replaceable> ] { ( <replaceable>masters</replaceable> | <replaceable>ipv4_address</replaceable> [ port
	    <replaceable>integer</replaceable> ] | <replaceable>ipv6_address</replaceable> [ port <replaceable>integer</replaceable> ] ) [ key
	    <replaceable>string</replaceable> ]; ... } ] [ zone-directory <replaceable>quoted_string</replaceable> ] [
	    <command>in-memory</command> <replaceable>boolean</replaceable> ] [ min-update-interval <replaceable>duration</replaceable> ]; ... };
	<command>check-dup-records</command> ( fail | warn | ignore );
	<command>check-integrity</command> <replaceable>boolean</replaceable>;
	<command>check-mx</command> ( fail | warn | ignore );
	<command>check-mx-cname</command> ( fail | warn | ignore );
	<command>check-names</command> ( primary | master |
	    <command>secondary</command> | slave | response ) (
	    <command>fail</command> | warn | ignore );
	<command>check-sibling</command> <replaceable>boolean</replaceable>;
	<command>check-spf</command> ( warn | ignore );
	<command>check-srv-cname</command> ( fail | warn | ignore );
	<command>check-wildcard</command> <replaceable>boolean</replaceable>;
	<command>clients-per-query</command> <replaceable>integer</replaceable>;
	<command>cookie-algorithm</command> ( aes | siphash24 );
	<command>cookie-secret</command> <replaceable>string</replaceable>;
	<command>coresize</command> ( default | unlimited | <replaceable>sizeval</replaceable> );
	<command>datasize</command> ( default | unlimited | <replaceable>sizeval</replaceable> );
	<command>deny-answer-addresses</command> { <replaceable>address_match_element</replaceable>; ... } [
	    <command>except-from</command> { <replaceable>string</replaceable>; ... } ];
	<command>deny-answer-aliases</command> { <replaceable>string</replaceable>; ... } [ except-from { <replaceable>string</replaceable>; ...
	    } ];
	<command>dialup</command> ( notify | notify-passive | passive | refresh | <replaceable>boolean</replaceable> );
	<command>directory</command> <replaceable>quoted_string</replaceable>;
	<command>disable-algorithms</command> <replaceable>string</replaceable> { <replaceable>string</replaceable>;
	    ... };
	<command>disable-ds-digests</command> <replaceable>string</replaceable> { <replaceable>string</replaceable>;
	    ... };
	<command>disable-empty-zone</command> <replaceable>string</replaceable>;
	<command>dns64</command> <replaceable>netprefix</replaceable> {
		<command>break-dnssec</command> <replaceable>boolean</replaceable>;
		<command>clients</command> { <replaceable>address_match_element</replaceable>; ... };
		<command>exclude</command> { <replaceable>address_match_element</replaceable>; ... };
		<command>mapped</command> { <replaceable>address_match_element</replaceable>; ... };
		<command>recursive-only</command> <replaceable>boolean</replaceable>;
		<command>suffix</command> <replaceable>ipv6_address</replaceable>;
	};
	<command>dns64-contact</command> <replaceable>string</replaceable>;
	<command>dns64-server</command> <replaceable>string</replaceable>;
	<command>dnskey-sig-validity</command> <replaceable>integer</replaceable>;
	<command>dnsrps-enable</command> <replaceable>boolean</replaceable>;
	<command>dnsrps-options</command> { <replaceable>unspecified-text</replaceable> };
	<command>dnssec-accept-expired</command> <replaceable>boolean</replaceable>;
	<command>dnssec-dnskey-kskonly</command> <replaceable>boolean</replaceable>;
	<command>dnssec-loadkeys-interval</command> <replaceable>integer</replaceable>;
	<command>dnssec-must-be-secure</command> <replaceable>string</replaceable> <replaceable>boolean</replaceable>;
	<command>dnssec-policy</command> <replaceable>string</replaceable>;
	<command>dnssec-secure-to-insecure</command> <replaceable>boolean</replaceable>;
	<command>dnssec-update-mode</command> ( maintain | no-resign );
	<command>dnssec-validation</command> ( yes | no | auto );
	<command>dnstap</command> { ( all | auth | client | forwarder |
	    <command>resolver</command> | update ) [ ( query | response ) ];
	    ... };
	<command>dnstap-identity</command> ( <replaceable>quoted_string</replaceable> | none |
	    <command>hostname</command> );
	<command>dnstap-output</command> ( file | unix ) <replaceable>quoted_string</replaceable> [
	    <command>size</command> ( unlimited | <replaceable>size</replaceable> ) ] [ versions (
	    <command>unlimited</command> | <replaceable>integer</replaceable> ) ] [ suffix ( increment
	    | timestamp ) ];
	<command>dnstap-version</command> ( <replaceable>quoted_string</replaceable> | none );
	<command>dscp</command> <replaceable>integer</replaceable>;
	<command>dual-stack-servers</command> [ port <replaceable>integer</replaceable> ] { ( <replaceable>quoted_string</replaceable> [ port
	    <replaceable>integer</replaceable> ] [ dscp <replaceable>integer</replaceable> ] | <replaceable>ipv4_address</replaceable> [ port
	    <replaceable>integer</replaceable> ] [ dscp <replaceable>integer</replaceable> ] | <replaceable>ipv6_address</replaceable> [ port
	    <replaceable>integer</replaceable> ] [ dscp <replaceable>integer</replaceable> ] ); ... };
	<command>dump-file</command> <replaceable>quoted_string</replaceable>;
	<command>edns-udp-size</command> <replaceable>integer</replaceable>;
	<command>empty-contact</command> <replaceable>string</replaceable>;
	<command>empty-server</command> <replaceable>string</replaceable>;
	<command>empty-zones-enable</command> <replaceable>boolean</replaceable>;
	<command>fetch-quota-params</command> <replaceable>integer</replaceable> <replaceable>fixedpoint</replaceable> <replaceable>fixedpoint</replaceable> <replaceable>fixedpoint</replaceable>;
	<command>fetches-per-server</command> <replaceable>integer</replaceable> [ ( drop | fail ) ];
	<command>fetches-per-zone</command> <replaceable>integer</replaceable> [ ( drop | fail ) ];
	<command>files</command> ( default | unlimited | <replaceable>sizeval</replaceable> );
	<command>flush-zones-on-shutdown</command> <replaceable>boolean</replaceable>;
	<command>forward</command> ( first | only );
	<command>forwarders</command> [ port <replaceable>integer</replaceable> ] [ dscp <replaceable>integer</replaceable> ] { ( <replaceable>ipv4_address</replaceable>
	    | <replaceable>ipv6_address</replaceable> ) [ port <replaceable>integer</replaceable> ] [ dscp <replaceable>integer</replaceable> ]; ... };
	<command>fstrm-set-buffer-hint</command> <replaceable>integer</replaceable>;
	<command>fstrm-set-flush-timeout</command> <replaceable>integer</replaceable>;
	<command>fstrm-set-input-queue-size</command> <replaceable>integer</replaceable>;
	<command>fstrm-set-output-notify-threshold</command> <replaceable>integer</replaceable>;
	<command>fstrm-set-output-queue-model</command> ( mpsc | spsc );
	<command>fstrm-set-output-queue-size</command> <replaceable>integer</replaceable>;
	<command>fstrm-set-reopen-interval</command> <replaceable>duration</replaceable>;
	<command>geoip-directory</command> ( <replaceable>quoted_string</replaceable> | none );
	<command>glue-cache</command> <replaceable>boolean</replaceable>;
	<command>heartbeat-interval</command> <replaceable>integer</replaceable>;
	<command>hostname</command> ( <replaceable>quoted_string</replaceable> | none );
	<command>inline-signing</command> <replaceable>boolean</replaceable>;
	<command>interface-interval</command> <replaceable>duration</replaceable>;
	<command>ixfr-from-differences</command> ( primary | master | secondary | slave |
	    <replaceable>boolean</replaceable> );
	<command>keep-response-order</command> { <replaceable>address_match_element</replaceable>; ... };
	<command>key-directory</command> <replaceable>quoted_string</replaceable>;
	<command>lame-ttl</command> <replaceable>duration</replaceable>;
	<command>listen-on</command> [ port <replaceable>integer</replaceable> ] [ dscp
	    <replaceable>integer</replaceable> ] {
	    <replaceable>address_match_element</replaceable>; ... };
	<command>listen-on-v6</command> [ port <replaceable>integer</replaceable> ] [ dscp
	    <replaceable>integer</replaceable> ] {
	    <replaceable>address_match_element</replaceable>; ... };
	<command>lmdb-mapsize</command> <replaceable>sizeval</replaceable>;
	<command>lock-file</command> ( <replaceable>quoted_string</replaceable> | none );
	<command>managed-keys-directory</command> <replaceable>quoted_string</replaceable>;
	<command>masterfile-format</command> ( map | raw | text );
	<command>masterfile-style</command> ( full | relative );
	<command>match-mapped-addresses</command> <replaceable>boolean</replaceable>;
	<command>max-cache-size</command> ( default | unlimited | <replaceable>sizeval</replaceable> | <replaceable>percentage</replaceable> );
	<command>max-cache-ttl</command> <replaceable>duration</replaceable>;
	<command>max-clients-per-query</command> <replaceable>integer</replaceable>;
	<command>max-journal-size</command> ( default | unlimited | <replaceable>sizeval</replaceable> );
	<command>max-ncache-ttl</command> <replaceable>duration</replaceable>;
	<command>max-records</command> <replaceable>integer</replaceable>;
	<command>max-recursion-depth</command> <replaceable>integer</replaceable>;
	<command>max-recursion-queries</command> <replaceable>integer</replaceable>;
	<command>max-refresh-time</command> <replaceable>integer</replaceable>;
	<command>max-retry-time</command> <replaceable>integer</replaceable>;
	<command>max-rsa-exponent-size</command> <replaceable>integer</replaceable>;
	<command>max-stale-ttl</command> <replaceable>duration</replaceable>;
	<command>max-transfer-idle-in</command> <replaceable>integer</replaceable>;
	<command>max-transfer-idle-out</command> <replaceable>integer</replaceable>;
	<command>max-transfer-time-in</command> <replaceable>integer</replaceable>;
	<command>max-transfer-time-out</command> <replaceable>integer</replaceable>;
	<command>max-udp-size</command> <replaceable>integer</replaceable>;
	<command>max-zone-ttl</command> ( unlimited | <replaceable>duration</replaceable> );
	<command>memstatistics</command> <replaceable>boolean</replaceable>;
	<command>memstatistics-file</command> <replaceable>quoted_string</replaceable>;
	<command>message-compression</command> <replaceable>boolean</replaceable>;
	<command>min-cache-ttl</command> <replaceable>duration</replaceable>;
	<command>min-ncache-ttl</command> <replaceable>duration</replaceable>;
	<command>min-refresh-time</command> <replaceable>integer</replaceable>;
	<command>min-retry-time</command> <replaceable>integer</replaceable>;
	<command>minimal-any</command> <replaceable>boolean</replaceable>;
	<command>minimal-responses</command> ( no-auth | no-auth-recursive | <replaceable>boolean</replaceable> );
	<command>multi-master</command> <replaceable>boolean</replaceable>;
	<command>new-zones-directory</command> <replaceable>quoted_string</replaceable>;
	<command>no-case-compress</command> { <replaceable>address_match_element</replaceable>; ... };
	<command>nocookie-udp-size</command> <replaceable>integer</replaceable>;
	<command>notify</command> ( explicit | master-only | <replaceable>boolean</replaceable> );
	<command>notify-delay</command> <replaceable>integer</replaceable>;
	<command>notify-rate</command> <replaceable>integer</replaceable>;
	<command>notify-source</command> ( <replaceable>ipv4_address</replaceable> | * ) [ port ( <replaceable>integer</replaceable> | * ) ] [
	    <command>dscp</command> <replaceable>integer</replaceable> ];
	<command>notify-source-v6</command> ( <replaceable>ipv6_address</replaceable> | * ) [ port ( <replaceable>integer</replaceable> | * ) ]
	    [ dscp <replaceable>integer</replaceable> ];
	<command>notify-to-soa</command> <replaceable>boolean</replaceable>;
	<command>nta-lifetime</command> <replaceable>duration</replaceable>;
	<command>nta-recheck</command> <replaceable>duration</replaceable>;
	<command>nxdomain-redirect</command> <replaceable>string</replaceable>;
	<command>pid-file</command> ( <replaceable>quoted_string</replaceable> | none );
	<command>port</command> <replaceable>integer</replaceable>;
	<command>preferred-glue</command> <replaceable>string</replaceable>;
	<command>prefetch</command> <replaceable>integer</replaceable> [ <replaceable>integer</replaceable> ];
	<command>provide-ixfr</command> <replaceable>boolean</replaceable>;
	<command>qname-minimization</command> ( strict | relaxed | disabled | off );
	<command>query-source</command> ( ( [ address ] ( <replaceable>ipv4_address</replaceable> | * ) [ port (
	    <replaceable>integer</replaceable> | * ) ] ) | ( [ [ address ] ( <replaceable>ipv4_address</replaceable> | * ) ]
	    <command>port</command> ( <replaceable>integer</replaceable> | * ) ) ) [ dscp <replaceable>integer</replaceable> ];
	<command>query-source-v6</command> ( ( [ address ] ( <replaceable>ipv6_address</replaceable> | * ) [ port (
	    <replaceable>integer</replaceable> | * ) ] ) | ( [ [ address ] ( <replaceable>ipv6_address</replaceable> | * ) ]
	    <command>port</command> ( <replaceable>integer</replaceable> | * ) ) ) [ dscp <replaceable>integer</replaceable> ];
	<command>querylog</command> <replaceable>boolean</replaceable>;
	<command>random-device</command> ( <replaceable>quoted_string</replaceable> | none );
	<command>rate-limit</command> {
		<command>all-per-second</command> <replaceable>integer</replaceable>;
		<command>errors-per-second</command> <replaceable>integer</replaceable>;
		<command>exempt-clients</command> { <replaceable>address_match_element</replaceable>; ... };
		<command>ipv4-prefix-length</command> <replaceable>integer</replaceable>;
		<command>ipv6-prefix-length</command> <replaceable>integer</replaceable>;
		<command>log-only</command> <replaceable>boolean</replaceable>;
		<command>max-table-size</command> <replaceable>integer</replaceable>;
		<command>min-table-size</command> <replaceable>integer</replaceable>;
		<command>nodata-per-second</command> <replaceable>integer</replaceable>;
		<command>nxdomains-per-second</command> <replaceable>integer</replaceable>;
		<command>qps-scale</command> <replaceable>integer</replaceable>;
		<command>referrals-per-second</command> <replaceable>integer</replaceable>;
		<command>responses-per-second</command> <replaceable>integer</replaceable>;
		<command>slip</command> <replaceable>integer</replaceable>;
		<command>window</command> <replaceable>integer</replaceable>;
	};
	<command>recursing-file</command> <replaceable>quoted_string</replaceable>;
	<command>recursion</command> <replaceable>boolean</replaceable>;
	<command>recursive-clients</command> <replaceable>integer</replaceable>;
	<command>request-expire</command> <replaceable>boolean</replaceable>;
	<command>request-ixfr</command> <replaceable>boolean</replaceable>;
	<command>request-nsid</command> <replaceable>boolean</replaceable>;
	<command>require-server-cookie</command> <replaceable>boolean</replaceable>;
	<command>reserved-sockets</command> <replaceable>integer</replaceable>;
	<command>resolver-nonbackoff-tries</command> <replaceable>integer</replaceable>;
	<command>resolver-query-timeout</command> <replaceable>integer</replaceable>;
	<command>resolver-retry-interval</command> <replaceable>integer</replaceable>;
	<command>response-padding</command> { <replaceable>address_match_element</replaceable>; ... } block-size
	    <replaceable>integer</replaceable>;
	<command>response-policy</command> { zone <replaceable>string</replaceable> [ add-soa <replaceable>boolean</replaceable> ] [ log
	    <replaceable>boolean</replaceable> ] [ max-policy-ttl <replaceable>duration</replaceable> ] [ min-update-interval
	    <replaceable>duration</replaceable> ] [ policy ( cname | disabled | drop | given | no-op
	    | nodata | nxdomain | passthru | tcp-only <replaceable>quoted_string</replaceable> ) ] [
	    <command>recursive-only</command> <replaceable>boolean</replaceable> ] [ nsip-enable <replaceable>boolean</replaceable> ] [
	    <command>nsdname-enable</command> <replaceable>boolean</replaceable> ]; ... } [ add-soa <replaceable>boolean</replaceable> ] [
	    <command>break-dnssec</command> <replaceable>boolean</replaceable> ] [ max-policy-ttl <replaceable>duration</replaceable> ] [
	    <command>min-update-interval</command> <replaceable>duration</replaceable> ] [ min-ns-dots <replaceable>integer</replaceable> ] [
	    <command>nsip-wait-recurse</command> <replaceable>boolean</replaceable> ] [ qname-wait-recurse <replaceable>boolean</replaceable> ]
	    [ recursive-only <replaceable>boolean</replaceable> ] [ nsip-enable <replaceable>boolean</replaceable> ] [
	    <command>nsdname-enable</command> <replaceable>boolean</replaceable> ] [ dnsrps-enable <replaceable>boolean</replaceable> ] [
	    <command>dnsrps-options</command> { <replaceable>unspecified-text</replaceable> } ];
	<command>root-delegation-only</command> [ exclude { <replaceable>string</replaceable>; ... } ];
	<command>root-key-sentinel</command> <replaceable>boolean</replaceable>;
	<command>rrset-order</command> { [ class <replaceable>string</replaceable> ] [ type <replaceable>string</replaceable> ] [ name
	    <replaceable>quoted_string</replaceable> ] <replaceable>string</replaceable> <replaceable>string</replaceable>; ... };
	<command>secroots-file</command> <replaceable>quoted_string</replaceable>;
	<command>send-cookie</command> <replaceable>boolean</replaceable>;
	<command>serial-query-rate</command> <replaceable>integer</replaceable>;
	<command>serial-update-method</command> ( date | increment | unixtime );
	<command>server-id</command> ( <replaceable>quoted_string</replaceable> | none | hostname );
	<command>servfail-ttl</command> <replaceable>duration</replaceable>;
	<command>session-keyalg</command> <replaceable>string</replaceable>;
	<command>session-keyfile</command> ( <replaceable>quoted_string</replaceable> | none );
	<command>session-keyname</command> <replaceable>string</replaceable>;
	<command>sig-signing-nodes</command> <replaceable>integer</replaceable>;
	<command>sig-signing-signatures</command> <replaceable>integer</replaceable>;
	<command>sig-signing-type</command> <replaceable>integer</replaceable>;
	<command>sig-validity-interval</command> <replaceable>integer</replaceable> [ <replaceable>integer</replaceable> ];
	<command>sortlist</command> { <replaceable>address_match_element</replaceable>; ... };
	<command>stacksize</command> ( default | unlimited | <replaceable>sizeval</replaceable> );
	<command>stale-answer-enable</command> <replaceable>boolean</replaceable>;
	<command>stale-answer-ttl</command> <replaceable>duration</replaceable>;
	<command>startup-notify-rate</command> <replaceable>integer</replaceable>;
	<command>statistics-file</command> <replaceable>quoted_string</replaceable>;
	<command>synth-from-dnssec</command> <replaceable>boolean</replaceable>;
	<command>tcp-advertised-timeout</command> <replaceable>integer</replaceable>;
	<command>tcp-clients</command> <replaceable>integer</replaceable>;
	<command>tcp-idle-timeout</command> <replaceable>integer</replaceable>;
	<command>tcp-initial-timeout</command> <replaceable>integer</replaceable>;
	<command>tcp-keepalive-timeout</command> <replaceable>integer</replaceable>;
	<command>tcp-listen-queue</command> <replaceable>integer</replaceable>;
	<command>tkey-dhkey</command> <replaceable>quoted_string</replaceable> <replaceable>integer</replaceable>;
	<command>tkey-domain</command> <replaceable>quoted_string</replaceable>;
	<command>tkey-gssapi-credential</command> <replaceable>quoted_string</replaceable>;
	<command>tkey-gssapi-keytab</command> <replaceable>quoted_string</replaceable>;
	<command>transfer-format</command> ( many-answers | one-answer );
	<command>transfer-message-size</command> <replaceable>integer</replaceable>;
	<command>transfer-source</command> ( <replaceable>ipv4_address</replaceable> | * ) [ port ( <replaceable>integer</replaceable> | * ) ] [
	    <command>dscp</command> <replaceable>integer</replaceable> ];
	<command>transfer-source-v6</command> ( <replaceable>ipv6_address</replaceable> | * ) [ port ( <replaceable>integer</replaceable> | * )
	    ] [ dscp <replaceable>integer</replaceable> ];
	<command>transfers-in</command> <replaceable>integer</replaceable>;
	<command>transfers-out</command> <replaceable>integer</replaceable>;
	<command>transfers-per-ns</command> <replaceable>integer</replaceable>;
	<command>trust-anchor-telemetry</command> <replaceable>boolean</replaceable>; // experimental
	<command>try-tcp-refresh</command> <replaceable>boolean</replaceable>;
	<command>update-check-ksk</command> <replaceable>boolean</replaceable>;
	<command>use-alt-transfer-source</command> <replaceable>boolean</replaceable>;
	<command>use-v4-udp-ports</command> { <replaceable>portrange</replaceable>; ... };
	<command>use-v6-udp-ports</command> { <replaceable>portrange</replaceable>; ... };
	<command>v6-bias</command> <replaceable>integer</replaceable>;
	<command>validate-except</command> { <replaceable>string</replaceable>; ... };
	<command>version</command> ( <replaceable>quoted_string</replaceable> | none );
	<command>zero-no-soa-ttl</command> <replaceable>boolean</replaceable>;
	<command>zero-no-soa-ttl-cache</command> <replaceable>boolean</replaceable>;
	<command>zone-statistics</command> ( full | terse | none | <replaceable>boolean</replaceable> );
};
</programlisting>
