From 07883f198d949c078085ccafab7eb61788721ae4 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Wed, 4 Oct 2017 18:09:32 +0900
Subject: [PATCH] man: empty string resets the list of NTP servers (#6984)

---
 man/timesyncd.conf.xml | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/man/timesyncd.conf.xml b/man/timesyncd.conf.xml
index 8c86fd0074..7c84e80d4d 100644
--- a/man/timesyncd.conf.xml
+++ b/man/timesyncd.conf.xml
@@ -80,7 +80,9 @@
         <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
         systemd-timesyncd will contact all configured system or
         per-interface servers in turn until one is found that
-        responds. This setting defaults to an empty
+        responds. When the empty string is assigned, the list of
+        NTP servers is reset, and all assignments prior to this one
+        will have no effect. This setting defaults to an empty
         list.</para></listitem>
       </varlistentry>
 
@@ -92,9 +94,11 @@
         <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
         take precedence over this setting, as do any servers set via
         <varname>NTP=</varname> above. This setting is hence only used
-        if no other NTP server information is known. If this option is
-        not given, a compiled-in list of NTP servers is used
-        instead.</para></listitem>
+        if no other NTP server information is known. When the empty
+        string is assigned, the list of NTP servers is reset,
+        and all assignments prior to this one will have no effect.
+        If this option is not given, a compiled-in list of NTP servers
+        is used instead.</para></listitem>
       </varlistentry>
 
     </variablelist>