man: add documentation about KeepConfiguration

diff --git a/man/systemd.network.xml b/man/systemd.network.xml
index 695bcaa0a47020475e8056457cff8d6891e7cb25..d832e68d71c5f781ec4fb52de5096b0aa1302e80 100644 (file)
--- a/man/systemd.network.xml
+++ b/man/systemd.network.xml
@@ -838,6 +838,22 @@
           </para>
         </listitem>
       </varlistentry>
+      <varlistentry>
+        <term><varname>KeepConfiguration=</varname></term>
+        <listitem>
+          <para>Takes a boolean or one of <literal>static</literal>, <literal>dhcp-on-stop</literal>,
+          <literal>dhcp</literal>. When <literal>static</literal>, <command>systemd-networkd</command>
+          will not drop static addresses and routes on starting up process. When set to
+          <literal>dhcp-on-stop</literal>, <command>systemd-networkd</command> will not drop addresses
+          and routes on stopping the daemon. When <literal>dhcp</literal>,
+          the addresses and routes provided by a DHCP server will never be dropped even if the DHCP
+          lease expires. This is contrary to the DHCP specification, but may be the best choice if,
+          e.g., the root filesystem relies on this connection. The setting <literal>dhcp</literal>
+          implies <literal>dhcp-on-stop</literal>, and <literal>yes</literal> implies
+          <literal>dhcp</literal> and <literal>static</literal>. Defaults to
+          <literal>dhcp-on-stop</literal>.</para>
+        </listitem>
+      </varlistentry>
 
       </variablelist>
 
@@ -1381,17 +1397,6 @@
           system. Defaults to <literal>no</literal>.</para></listitem>
         </varlistentry>
 
-        <varlistentry>
-          <term><varname>CriticalConnection=</varname></term>
-          <listitem>
-            <para>When true, the connection will never be torn down
-            even if the DHCP lease expires. This is contrary to the
-            DHCP specification, but may be the best choice if, say,
-            the root filesystem relies on this connection. Defaults to
-            false.</para>
-          </listitem>
-        </varlistentry>
-
         <varlistentry>
           <term><varname>ClientIdentifier=</varname></term>
           <listitem>