allow mobs to walk on stone

init.lua

@@ -189,6 +189,10 @@ if minetest.get_modpath("bonemeal") then
 	dofile(MP.."/bonemeal.lua")
 end
 
+if minetest.get_modpath("mobs") then
+	dofile(MP .. "/mobs.lua")
+end
+
 if minetest.get_modpath("mobs_animal") then
 	-- additional animals/textures
 	dofile(MP.."/mobs_animal.lua")
@@ -222,3 +226,4 @@ end
 if minetest.get_modpath("toolranks") then
 	dofile(MP.."/toolranks.lua")
 end
+

mobs.lua

@@ -0,0 +1,9 @@
+-- mobs and beowolf don't play nicely together when stone is made
+-- dangerous by beowolf, we counteract that here to make mobs not fear
+-- stone and become more challenging again
+local is_node_dangerous = mobs.is_node_dangerous
+function mobs.is_node_dangerous(mob_obj, nodename)
+    if 'default:stone' == nodename then return false end
+    return is_node_dangerous(mob_obj, nodename)
+end
+