udev: net_setup - allow matching on OriginalName=

This has been requested repeatedly, so let's give it a go. We explicitly do not allow matching
on names that have already been changed (from a previous udev run, or otherwise), and matching
on unpredictable names (ethX) is discouraged (but not currently disallowed).

We also currently allow:

[Match]
Name=veth0

[Link]
Name=my-name0
SomeOtherSetting=true

Which means that the link file will be applied the first time it is invoked, but
not on subsequent invocations, which may be surprising.

src/network/networkd-netdev.c

@@ -654,7 +654,7 @@ static int netdev_load_one(Manager *manager, const char *filename) {
         if (net_match_config(NULL, NULL, NULL, NULL, NULL,
                              netdev_raw->match_host, netdev_raw->match_virt,
                              netdev_raw->match_kernel, netdev_raw->match_arch,
-                             NULL, NULL, NULL, NULL, NULL, NULL) <= 0)
+                             NULL, NULL, NULL, NULL, NULL, NULL, false) <= 0)
                 return 0;
 
         if (!NETDEV_VTABLE(netdev_raw)) {

src/network/networkd-network.c

@@ -216,7 +216,7 @@ int network_get(Manager *manager, struct udev_device *device,
                                      udev_device_get_driver(udev_device_get_parent(device)),
                                      udev_device_get_property_value(device, "ID_NET_DRIVER"),
                                      udev_device_get_devtype(device),
-                                     ifname)) {
+                                     ifname, false)) {
                         log_debug("%-*s: found matching network '%s'", IFNAMSIZ, ifname,
                                   network->filename);
                         *ret = network;