[plasma-desktop] doc/kcontrol/clock: Update clock docbook to 5.12

[Burkhard Lück]

Git commit b9d2f63fe1c2e377c49234cba14637cf94183611 by Burkhard Lück.
Committed on 29/03/2018 at 16:43.
Pushed by lueck into branch 'master'.

Update clock docbook to 5.12

proofread + update
bump date + releaseinfo
add systemd
remove commented and outdated info

Differential Revision: https://phabricator.kde.org/D11695

M  +17   -28   doc/kcontrol/clock/index.docbook

https://commits.kde.org/plasma-desktop/b9d2f63fe1c2e377c49234cba14637cf94183611

diff --git a/doc/kcontrol/clock/index.docbook b/doc/kcontrol/clock/index.docbook
index 69afa0a8..f63169b4 100644
--- a/doc/kcontrol/clock/index.docbook
+++ b/doc/kcontrol/clock/index.docbook
@@ -13,8 +13,8 @@
 <!-- TRANS:ROLES_OF_TRANSLATORS -->
 </authorgroup>
 
-<date>2013-12-05</date>
-<releaseinfo>4.12</releaseinfo>
+<date>2018-03-25</date>
+<releaseinfo>&plasma; 5.12</releaseinfo>
 
 <keywordset>
 <keyword>KDE</keyword>
@@ -43,40 +43,29 @@ you the current settings, but your changes will not be saved.</para></note>
 <sect2 id="date-change">
 <title>Date and Time</title>
 
-<para>If you check <guilabel>Set date and time automatically</guilabel> you are able
-to select a <guilabel>Time server</guilabel> from the drop down box and all other 
-settings in this dialog are disabled.</para>
-
-<note>
-<para>The applications <command>rdate</command> or <command>ntpdate</command> are used in  
-this module to fetch date and time from a time server. This happens when you log in to &kde;
-while being online or when you later connect to the Internet and access to time 
-servers is possible.</para> 
-<para>Both applications are simple <acronym>NTP</acronym> clients that set a system's clock 
-to match the time obtained by communicating with one or more <acronym>NTP</acronym> servers. 
-This is not sufficient, however, for maintaining an accurate clock in the long run. 
-This is useful for occasionally setting the time on machines that do not have full-time 
-network access, such as laptops.</para>
-</note>
+<para>If you check <guilabel>Set date and time automatically</guilabel>
+this module will use <acronym>systemd</acronym> to fetch date and time.</para>
+
+<para>On a computer without <acronym>systemd</acronym> the <acronym>NTP</acronym>
+utilities <command>rdate</command> or <command>ntpdate</command> are used.
+If these utilities are missing please install them.
+</para>
+
+<para>When you log in to the &plasma; session while being online or when you later
+connect to the Internet the access to one or more <acronym>NTP</acronym> servers happens.</para>
+<para>This is not sufficient, however, for maintaining an accurate clock in the long run.
+This is useful for occasionally setting the time on machines that do not have full-time
+network access, such as laptops.
+</para>
 
 <para>If you do not use a time server, you are able to set the date manually 
-using the lower half of the tab.  Simply
-choose your month and year using the controls at the top of the calendar
-and the day of the month by clicking on the day in the
-calendar.</para>
+in the calendar.</para>
 <para>Use the controls at the bottom of the calendar
 to select the current date, enter the date in the edit box or select the 
 week of the year from the drop down box.</para>
 
 <para>You set the time using the spin boxes at the bottom of the analog clock.
 You can also directly enter your value.</para>
-<!--Outdated
-<note><para>The time is represented in 24 hour format.  If you want
-the system time to be set to 8:00 PM, you need to set the hour spinbox
-to <guilabel>20</guilabel> (8 + 12).  If you want the system time set
-to 8:00 AM, you should set the hour spinbox to
-<guilabel>8</guilabel>.</para></note>
--->
 </sect2>
 
 <sect2 id="date-time-tone">