Updated mesecons and pipeworks

- Added security on devices from pipeworks (breaker,placer)
- Added new mod in mesecons : mesecons_stickyblocks

mods/mesecons/mesecons_stickyblocks/depends.txt

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+mesecons
+mesecons_mvps

mods/mesecons/mesecons_stickyblocks/init.lua

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+-- Sticky blocks can be used together with pistons or movestones to push / pull
+-- structures that are "glued" together using sticky blocks
+
+-- All sides sticky block
+minetest.register_node("mesecons_stickyblocks:sticky_block_all", {
+	description = "All-sides sticky block",
+	tiles = {"default_grass_footsteps.png"},
+	groups = {dig_immediate=2},
+	mvps_sticky = function (pos, node)
+		local connected = {}
+		for _, r in ipairs(mesecon.rules.alldirs) do
+			table.insert(connected, vector.add(pos, r))
+		end
+		return connected
+	end
+})