Fix a glitch where the player gets liquids in his inventory when the server lags

mods/default/init.lua

@@ -1063,6 +1063,7 @@ minetest.register_node("default:water_flowing", {
 	pointable = false,
 	diggable = false,
 	buildable_to = true,
+	drop = "",
 	liquidtype = "flowing",
 	liquid_alternative_flowing = "default:water_flowing",
 	liquid_alternative_source = "default:water_source",
@@ -1088,6 +1089,7 @@ minetest.register_node("default:water_source", {
 	pointable = false,
 	diggable = false,
 	buildable_to = true,
+	drop = "",
 	liquidtype = "source",
 	liquid_alternative_flowing = "default:water_flowing",
 	liquid_alternative_source = "default:water_source",
@@ -1119,6 +1121,7 @@ minetest.register_node("default:lava_flowing", {
 	pointable = false,
 	diggable = false,
 	buildable_to = true,
+	drop = "",
 	liquidtype = "flowing",
 	liquid_alternative_flowing = "default:lava_flowing",
 	liquid_alternative_source = "default:lava_source",
@@ -1145,6 +1148,7 @@ minetest.register_node("default:lava_source", {
 	pointable = false,
 	diggable = false,
 	buildable_to = true,
+	drop = "",
 	liquidtype = "source",
 	liquid_alternative_flowing = "default:lava_flowing",
 	liquid_alternative_source = "default:lava_source",