add antilag mod

from appguru

mods/antilag/init.lua

@@ -0,0 +1,13 @@
+local min_lag = 1 -- in seconds
+local min_times = 10 -- has to occur 10x
+local times = 0
+minetest.register_globalstep(function(lag)
+    if lag < min_lag then
+        times = 0
+    else
+        times = times + 1
+        if times >= min_times then
+            minetest.request_shutdown("Server shutting down due to high latency (lag).")
+        end
+    end
+end)