Avoid slow contextualization

src/etc/one-context.d/loc-10-network.d/netcfg-networkd

@@ -269,6 +269,13 @@ gen_network_configuration()
 {
     _context_interfaces=$(get_context_interfaces)
 
+    _networkd_version=$(networkctl --version | head -1 | awk '{print $2}')
+
+    if [ -n "$_networkd_version" ]; then
+        # put some dummy low version if not detected
+        _networkd_version="100"
+    fi
+
     for _iface in $_context_interfaces; do
         setup_iface_vars "$_iface"
 
@@ -286,6 +293,9 @@ gen_network_configuration()
         #
         # This occurs at least with systemd/networkd version 248, which is on
         # Cent OS 8 for example.
+
+
+        if [ $_networkd_version -le 250 ]; then
             if is_networkd_iface_managed "${dev}" ; then
                 # networkctl up/down is not on ubuntu <21.04
                 networkctl down "$dev" 2>/dev/null || true
@@ -293,6 +303,7 @@ gen_network_configuration()
                 # this is still necessary to really unconfigure the interface
                 ip addr flush "$dev"
             fi
+        fi
 
         {
             cat <<EOT