network: license all config files as CC0

Same justification as the previous commit.

$ for i in network/*-*; do git blame $i;done | less
shows that those files were written by Tom Gundersen, Lennart Poettering, Yu
Watanabe, me, and Marc-André Lureau.

1 files changed, 10 insertions, 6 deletions

diff --git a/network/80-vm-vt.network b/network/80-vm-vt.network
index e8365df31e..f1cb60fd1b 100644
--- a/network/80-vm-vt.network
+++ b/network/80-vm-vt.network
@@ -1,11 +1,15 @@
-#  SPDX-License-Identifier: LGPL-2.1-or-later
+# SPDX-License-Identifier: CC0-1.0
 #
-#  This file is part of systemd.
+# This config file is installed as part of systemd.
+# It may be freely copied and edited (following the Creative Commons Zero v1.0 Universal License).
 #
-#  systemd is free software; you can redistribute it and/or modify it
-#  under the terms of the GNU Lesser General Public License as published by
-#  the Free Software Foundation; either version 2.1 of the License, or
-#  (at your option) any later version.
+# To make local modifications, one of the following methods may be used:
+# 1. add a drop-in file that extends this file by creating the
+#    /etc/systemd/network/80-vm-vt.network.d/ directory and creating a
+#    new .conf file there.
+# 2. copy this file into /etc/systemd/network or one of the other paths checked
+#    by systemd-networkd and edit it there.
+# This file should not be edited in place, because it'll be overwritten on upgrades.
 
 # This network file matches vt-* TUN/TAP devices and applies a similar
 # configuration as ve-* to provide NAT/DHCP to VMs.