man: systemd.netdev - make it clear that we do not touch preexisting netdevs

We will happily use bridges/bonds as master devices, but we will not change their settings if they were created by
someone else.

diff --git a/man/systemd.netdev.xml b/man/systemd.netdev.xml
index e7eb5a0fe0933bf732a1b5dc5d3308376f455296..0a2cbab09398e355bb03d4b192898a7d00971063 100644 (file)
--- a/man/systemd.netdev.xml
+++ b/man/systemd.netdev.xml
@@ -60,7 +60,10 @@
 
                 <para>Virtual Network Device files must have the extension
                 <filename>.netdev</filename>; other extensions are ignored. Virtual
-                network devices are created as soon as networkd is started.</para>
+                network devices are created as soon as networkd is started. If a netdev
+                with the specified name already exists, networkd will use that as-is
+                rather than create its own. Note that the settings of the pre-existing
+                netdev will not be changed by networkd.</para>
 
                 <para>The <filename>.netdev</filename> files are read from the files located in the
                 system network directory <filename>/usr/lib/systemd/network</filename>,