allow sys-whonix, whonix-gw and whonix-ws by default to open links in anon-whonix

https://phabricator.whonix.org/T452

qubes-rpc-policy/qubes.OpenInVM.policy

@@ -3,5 +3,8 @@
 
 ## Please use a single # to start your custom comments
 
+sys-whonix anon-whonix allow
+whonix-gw anon-whonix allow
+whonix-ws anon-whonix allow
 $anyvm	$dispvm	allow
 $anyvm	$anyvm	ask