Merge pull request #4701 from martinpitt/networkd-polkit

hostnamed: allow networkd to set the transient hostname

src/hostname/systemd-networkd-hostname.pkla

@@ -0,0 +1,4 @@
+[Allow systemd-networkd to set transient hostname]
+Identity=unix-user:systemd-network
+Action=org.freedesktop.hostname1.set-hostname
+ResultAny=yes

src/hostname/systemd-networkd-hostname.rules

@@ -0,0 +1,5 @@
+polkit.addRule(function(action, subject) {
+    if (action.id == "org.freedesktop.hostname1.set-hostname" && subject.user == "systemd-network") {
+        return polkit.Result.YES;
+    }
+});