territory marker changes/fixes: now stack_as_node. now pickup as group by default. now correctly right-clicks into existing stack. go stone now blocks optics

rules.lua

@@ -297,7 +297,10 @@ end
 function lc_liberties.handle_territory_fill(itemstack, placer, pointed_thing)
     cache = {}
 
-    if placer.get_player_control and placer:get_player_control().aux1 then
+    if (placer.get_player_control and placer:get_player_control().aux1)
+            or
+        (pointed_thing and pointed_thing.under and minetest.get_node(pointed_thing.under).name == "nc_items:stack")
+            then
         return minetest.item_place(itemstack, placer, pointed_thing)
     end
 
@@ -320,7 +323,10 @@ end
 function lc_liberties.handle_dig(pos, node, digger)
     cache = {}
 
-    if digger.get_player_control and digger:get_player_control().aux1 then
+    if (digger.get_player_control and digger:get_player_control().aux1)
+                ~=
+            (minetest.registered_items[node.name].groups.go_territory_marker ~= nil)
+                then
         for i, v in pairs(connected_group(pos).stones) do
             minetest.node_dig(v, node, digger)
         end

stones.lua

@@ -61,6 +61,7 @@ local function reg(name, basename, basedef)
             snappy = 1,
             falling_node = 1,
             falling_repose = 1,
+            optic_opaque = 1,
             go_stone = 1
         },
 
@@ -106,6 +107,7 @@ local function reg(name, basename, basedef)
             falling_node = 1,
             falling_repose = 1,
             go_territory_marker = 1,
+            stack_as_node = 1,
         },
 
         go_team = name,