From b1042e011ced4f2c1a5c8ea3bc33f12b011e9d21 Mon Sep 17 00:00:00 2001
From: Evan Hunt <each@isc.org>
Date: Mon, 23 Oct 2017 19:39:56 -0700
Subject: [PATCH] [master] zone "file" option was undocumented

---
 doc/arm/Bv9ARM-book.xml | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
index ade3669917..42e9478876 100644
--- a/doc/arm/Bv9ARM-book.xml
+++ b/doc/arm/Bv9ARM-book.xml
@@ -12510,6 +12510,23 @@ view "external" {
 		</listitem>
 	      </varlistentry>
 
+	      <varlistentry>
+		<term><command>file</command></term>
+		<listitem>
+		  <para>
+		    Set the zone's filename. In <command>master</command>,
+		    <command>hint</command>, and <command>redirect</command>
+		    zones which do not have <command>masters</command>
+		    defined, zone data is loaded from this file. In
+		    <command>slave</command>, <command>stub</command>, and
+		    <command>redirect</command> zones which do have
+		    <command>masters</command> defined, zone data is
+		    retrieved from another server and saved in this file.
+		    This option is not applicable to other zone types.
+		  </para>
+		</listitem>
+	      </varlistentry>
+
 	      <varlistentry>
 		<term><command>forward</command></term>
 		<listitem>