Made bushes also spawn on wet or dry farming soil

(at the same rates as anywhere else)

Slowed down overall berry regrowth and at the same time make it so that
if a bush is planted on wet farming soil, it will re-grow its berries
faster, provided the soil remains wet.

On average, a wild bush will regrow its berries 50% slower than before,
while a farmed bush will regrow its berries twice as fast as the wild
ones did before (about 3x faster than wild ones do now).

bushes_classic/init.lua

@@ -37,7 +37,9 @@ plantslib:spawn_on_surfaces({
 		"default:dirt_with_grass",
 		"woodsoils:dirt_with_leaves_1",
 		"woodsoils:grass_with_leaves_1",
-		"woodsoils:grass_with_leaves_2"
+		"woodsoils:grass_with_leaves_2",
+		"farming:soil",
+		"farming:soil_wet"
 	},
 	avoid_nodes = {"group:bush"},
 	seed_diff = 545342534, -- chosen by a fair mashing of the keyboard - guaranteed to be random :P

bushes_classic/nodes.lua

@@ -123,13 +123,17 @@ end
 minetest.register_abm({
 	nodenames = { "bushes:fruitless_bush" },
 	interval = 500,
-	chance = 10,
+	chance = 5,
 	action = function(pos, node, active_object_count, active_object_count_wider)
 
 		local meta = minetest.env:get_meta( pos );
 		local bush_name = meta:get_string( 'bush_type' ); 
 		if( bush_name ~= nil and bush_name ~= '' ) then
-				minetest.env:set_node( pos, {type='node',name='bushes:'..bush_name..'_bush'});
+			local dirtpos = { x = pos.x, y = pos.y-1, z = pos.z }
+			local dirt = minetest.get_node(dirtpos)
+			if dirt.name == "farming:soil_wet" or math.random(1,3) == 1 then
+				minetest.env:set_node( pos, {type='node',name='bushes:'..bush_name..'_bush'})
+			end
 		end
 	end
 })