feat(Reload): Implement daemon-reload over dbus

Author: bcwaldon

dbus/methods.go

@@ -255,3 +255,9 @@ type EnableUnitFileChange struct {
 	Filename    string // File name of the symlink
 	Destination string // Destination of the symlink
 }
+
+// Reload instructs systemd to scan for and reload unit files. This is
+// equivalent to a 'systemctl daemon-reload'.
+func (c *Conn) Reload() (string, error) {
+	return c.runJob("Reload")
+}