tdehwlib: Add allowed access for plugdev group members.

This is useful if the system no longer supports policy at_console.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit 7f7f7322f9)

tdecore/tdehw/hwlibdaemons/dbus/org.trinitydesktop.hardwarecontrol.conf

@@ -37,6 +37,34 @@
            send_interface="org.trinitydesktop.hardwarecontrol.Power"/>
   </policy>
 
+  <policy group="plugdev">
+  <!-- Users who are members of the plugdev group are allowed access -->
+    <allow send_destination="org.trinitydesktop.hardwarecontrol"
+           send_interface="org.freedesktop.DBus.Introspectable"/>
+
+    <allow send_destination="org.trinitydesktop.hardwarecontrol"
+           send_interface="org.freedesktop.DBus.Properties"/>
+    <allow send_destination="org.trinitydesktop.hardwarecontrol.Brightness"
+           send_interface="org.freedesktop.DBus.Properties"/>
+    <allow send_destination="org.trinitydesktop.hardwarecontrol.CPUGovernor"
+           send_interface="org.freedesktop.DBus.Properties"/>
+    <allow send_destination="org.trinitydesktop.hardwarecontrol.InputEvents"
+           send_interface="org.freedesktop.DBus.Properties"/>
+    <allow send_destination="org.trinitydesktop.hardwarecontrol.Power"
+           send_interface="org.freedesktop.DBus.Properties"/>
+
+    <allow send_destination="org.trinitydesktop.hardwarecontrol"
+           send_interface="org.trinitydesktop.hardwarecontrol"/>
+    <allow send_destination="org.trinitydesktop.hardwarecontrol"
+           send_interface="org.trinitydesktop.hardwarecontrol.Brightness"/>
+    <allow send_destination="org.trinitydesktop.hardwarecontrol"
+           send_interface="org.trinitydesktop.hardwarecontrol.CPUGovernor"/>
+    <allow send_destination="org.trinitydesktop.hardwarecontrol"
+           send_interface="org.trinitydesktop.hardwarecontrol.InputEvents"/>
+    <allow send_destination="org.trinitydesktop.hardwarecontrol"
+           send_interface="org.trinitydesktop.hardwarecontrol.Power"/>
+  </policy>
+
   <policy context="default">
     <!-- Everyone else is denied access -->
     <deny own="org.trinitydesktop.hardwarecontrol"/>