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.

9 files changed, 81 insertions, 48 deletions

diff --git a/LICENSES/README.md b/LICENSES/README.md
index 2f825c44be..69ef2d6315 100644
--- a/LICENSES/README.md
+++ b/LICENSES/README.md
@@ -48,6 +48,7 @@ The following exceptions apply:
    - src/systemctl/systemd-sysv-install.SKELETON
    - tools/check-includes.pl
    - all examples under man/
+   - config files and examples under /network
  * the following sources are under **Public Domain** (LicenseRef-murmurhash2-public-domain):
    - src/basic/MurmurHash2.c
    - src/basic/MurmurHash2.h
diff --git a/network/80-6rd-tunnel.network b/network/80-6rd-tunnel.network
index 2e479eb1ac..6b9748a072 100644
--- a/network/80-6rd-tunnel.network
+++ b/network/80-6rd-tunnel.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/80-6rd-tunnel.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 6rd-* SIT devices which is automatically created by
 # systemd-networkd when DHCPv4 6RD option is received.
diff --git a/network/80-container-host0.network b/network/80-container-host0.network
index a8e683455b..da92b6bd00 100644
--- a/network/80-container-host0.network
+++ b/network/80-container-host0.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-container-host0.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 the container-side of the virtual Ethernet link
 # created by systemd-nspawn's --network-veth switch. See systemd-nspawn(1) for
diff --git a/network/80-container-vb.network b/network/80-container-vb.network
index 37f43c6543..9908f87580 100644
--- a/network/80-container-vb.network
+++ b/network/80-container-vb.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-container-vb.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 the host-side of the virtual Ethernet link
 # created by systemd-nspawn's --network-veth switch with --network-bridge or
diff --git a/network/80-container-ve.network b/network/80-container-ve.network
index 0c233bc8e0..10441a571c 100644
--- a/network/80-container-ve.network
+++ b/network/80-container-ve.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-container-ve.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 the host-side of the virtual Ethernet link
 # created by systemd-nspawn's --network-veth switch. See systemd-nspawn(1) for
diff --git a/network/80-container-vz.network b/network/80-container-vz.network
index 1c58f7d508..6861fe7dff 100644
--- a/network/80-container-vz.network
+++ b/network/80-container-vz.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-container-vz.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 the bridge interface created by systemd-nspawn's
 # --network-zone= switch. See systemd-nspawn(1) for details.
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.
diff --git a/network/80-wifi-adhoc.network b/network/80-wifi-adhoc.network
index c0c388f165..3d5ba3cad5 100644
--- a/network/80-wifi-adhoc.network
+++ b/network/80-wifi-adhoc.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-wifi-adhoc.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.
 
 [Match]
 Type=wlan
diff --git a/network/99-default.link b/network/99-default.link
index bca660ac28..dad91bb1a2 100644
--- a/network/99-default.link
+++ b/network/99-default.link
@@ -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/99-default.link.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-udevd and edit it there.
+# This file should not be edited in place, because it'll be overwritten on upgrades.
 
 [Match]
 OriginalName=*