Set IPv6PrivacyExtensions=yes in global systemd-netorkd configuration

Since systemd 245, IPv6PrivacyExtensions can be set not just per
connection, but also globally for all connection with a configuration
file in /etc/systemd/network.conf.d/.

CHANGELOG.rst

@@ -14,6 +14,7 @@ Changed
 - Moved custom ``mkinitcpio.conf`` files to ``/etc/mkinitcpio.conf.d/archiso.conf``.
 - Mount ``/etc/pacman.d/gnupg`` on tmpfs with option ``noswap`` instead of using ramfs. This ensures there is a limit to
   the file system size.
+- Enable systemd-networkd's support for IPv6 Privacy Extensions globally instead of per-connection.
 
 Deprecated
 ----------

configs/baseline/airootfs/etc/systemd/network.conf.d/ipv6-privacy-extensions.conf

@@ -0,0 +1,2 @@
+[Network]
+IPv6PrivacyExtensions=yes

configs/baseline/airootfs/etc/systemd/network/20-ethernet.network

@@ -8,4 +8,3 @@ Name=eth*
 [Network]
 DHCP=yes
 MulticastDNS=yes
-IPv6PrivacyExtensions=yes

configs/releng/airootfs/etc/systemd/network.conf.d/ipv6-privacy-extensions.conf

@@ -0,0 +1,2 @@
+[Network]
+IPv6PrivacyExtensions=yes

configs/releng/airootfs/etc/systemd/network/20-ethernet.network

@@ -8,7 +8,6 @@ Name=eth*
 [Network]
 DHCP=yes
 MulticastDNS=yes
-IPv6PrivacyExtensions=yes
 
 # systemd-networkd does not set per-interface-type default route metrics
 # https://github.com/systemd/systemd/issues/17698

configs/releng/airootfs/etc/systemd/network/20-wlan.network

@@ -4,7 +4,6 @@ Name=wl*
 [Network]
 DHCP=yes
 MulticastDNS=yes
-IPv6PrivacyExtensions=yes
 
 # systemd-networkd does not set per-interface-type default route metrics
 # https://github.com/systemd/systemd/issues/17698

configs/releng/airootfs/etc/systemd/network/20-wwan.network

@@ -3,7 +3,6 @@ Name=ww*
 
 [Network]
 DHCP=yes
-IPv6PrivacyExtensions=yes
 
 # systemd-networkd does not set per-interface-type default route metrics
 # https://github.com/systemd/systemd/issues/17698